Senior Year Ponies Up

Chapters

In Which Sunset Imports Pharmaceuticals from Another Dimension
In Which Sunset Discovers Some Unlisted Side Effects
In Which Sunset Engages (and Ejaculates) in Scientific Inquiry
In Which Sunset's Water Bottle is Found, Along With her Secret
In Which Sunset is Unaware of Ominous Developments, And Takes a Class Trip
In Which Things Spread (In Several Senses)
In Which Scientific Progress Goes "Oh Yeah Just Like That" And Similar Exclaimations
In Which Sunset Somehow Gets Off Clean (But Also Gets Off Messy, As Usual)
Bonus Chapter: In Which Trixie Gets Her Cum-Up-Ins
Bonus Chapter: Nurse Redheart's Exit "In"-terview
Epilogue: The Canterlot Files

In Which Sunset Imports Pharmaceuticals from Another Dimension

Author's Note

This chapter occurs a week or so after Interlude Four of The Second Story Club.

In Which Sunset Imports Pharmaceuticals from Another Dimension

For the first time since coming to the human world, Sunset Shimmer couldn't wait for school to end. Though she had no plans with her friends, she nonetheless was eagerly waiting for the end of school and after school activities. Specifically, she was waiting for 6:37pm exactly, when she was expecting a delivery. From home.

It had started several months ago, when Twilight began sharing her sexual adventures with Sunset through their magic journal. After infiltrating her friends' gossip club and unintentionally turning it into a sex club, Twilight had a series of increasingly improbable adventures that ended up in her dating Applejack, Rainbow Dash, and Rarity all at once. Sunset eagerly anticipated the stories of their escapades. While she'd mostly grown used to the human world, she realized only after reading Twilight's often detailed accounts that something was missing in her sex life in the human world. Sure, she'd hooked up with Flash a few times, mostly out of boredom or a desire to bind him closer to her (just thinking this made her a bit sad), but she'd rarely found it compelling. She thought she must just not really be into humans. And even Twilight's descriptions, while they turned her on, rarely made her consider masturbating, and never made her actually do it.

Then, one fateful day, Twilight told her about the spell that made a mare grow a cock, and how Applejack had rutted her with it. Suddenly she thought of human Twilight, twisting and moaning while Sunset's own cock plunged in and out of her. Or human Applejack wrangling her shaft with an enthusiastic hand. Or human Rarity, surprised and covered, face and generous breasts in a load of her, Sunset's hot cum, straight from her dick.

Then she realized that humans were great, she just didn't have the equipment she wanted.

She confided in Twilight, of course, but there seemed to be nothing to do about it. Though they both knew some magic functioned in the human world, Twilight or any other unicorn would lose her horn as soon as she went through the portal, and be unable to cast the spell. Sunset loved her stories anyway. Twilight nearly came through the portal in a panic when Sunset didn't respond to her story about rutting Applejack for the first time for a full half hour. It was just as well she didn't, though, as Sunset had been furiously stroking herself to a series of near-shattering orgasms at the thought.

But then, just a week ago, Twilight told her about Apple Bloom's potions, which replicated the spell. After some investigation, Twilight concluded they were likely to survive the trip through the portal fully functional. In the name of friendship, and supporting Apple Bloom, she was willing to front the cost.

And today, at for some reason the very specific 6:37pm exactly, they were scheduled to arrive. She considered it a victory that she could appear to listen in class, and didn't leak through her panties on to her chair. Though of course, when Twilight pressed her on what exactly she planned to do with the potions, she had to admit she wasn't sure. For now, she was just excited about being able to see if having a dick was as hot as she thought it would be. She had to admit, to Twilight and herself, that about all she was likely to do with one was jerk it off while reading the journal. Though even that sounded delightful right about now. Twilight herself wasn't even able to come help. Not only was she very busy with all her marefriends in Equestria, there was a Princess summit coming up as well.

So it was, then, that an extremely but nonspecifically horny Sunset Shimmer found herself waiting at the statue outside the deserted school, just as the Spring evening was getting dark. She gazed at her phone's readout agonizingly. The final six never seemed to want to change! Then, finally, it did, and just at that moment, with a glimmer of magic, a large crate appeared next to the statue, without even emerging from the base as usual.

"Fancy, Sparkle," Sunset muttered under her breath. The package was far bigger than she expected, milk-crate sized, and she wondered how many doses they'd sent along. Then she wondered what she would possibly do with it all. Eager to try it and without any other ideas, she hurried to the locker room and her gym locker. The school was technically closed, but she knew there were no alarms, and she'd long since acquired a set of keys. Though they were a legacy of her time on the wrong side of friendship and light, she kept them on the grounds that sometimes Luna and Celestia didn't realize she was needed somewhere. Like now, she was badly needed in the privacy of the girls' locker room.

As soon as the door closed behind her, she pulled open her locker, put the crate on the bottom, and opened it up. Half the bottles were labeled in yellow, the other half in blue, and both were covered in dense Equestrian script. She was about to pull one out to read it when she saw a note attached to the inside of the crate's lid, and read that instead.

Howdy Sunset,

I hope you like my potions. I dunno if Twilight told you, but I just got my cutie mark in making stuff like this! I'm real excited to be able to help ponies people do what they want with the ponies people they care about. We didn't know how long you'd be there or what you might wanna get up to someday, so I sent you plenty of doses, and both kinds. The blue ones have got a contraceptive potion mixed in, so take it when you just want some fun. If you ever get real serious with someponyperson, the yellow ones are full strength. I dunno how humans work, but in ponies they're so strong sometimes they'll knock you up even if you aren't in heat. So be careful with those. Let me, or uh, I guess Twi, know if you ever need any more.

Apple Bloom

P.S. They're pretty strong, and you should only use 'em if you're gonna rut right then. Otherwise you'll be really horny for up to eight hours. Also the contraception wears off in about six, that goes double for the blue ones.

Sunset scratched her head. She couldn't imagine wanting to get some girl pregnant on such short notice she'd not have time to send to Equestria for the right potion, though the idea did make her feel even hornier than before. Still, she was grateful for Apple Bloom's thoughtfulness, and supposed she wasn't sure exactly how much energy and calculation it took Twilight to send the things over.

She realized she'd been woolgathering, trying to convince herself not to just take a potion right now, even without someone to rut afterwards. She also realized she'd never succeed. She'd given Flash plenty of handjobs, surely she could just take care of it herself, horny or no. And she couldn't resist seeing if they worked.

Looking at the blue and yellow labels, she hesitated. Her first impulse was to grab a yellow potion. After all, she could hardly impregnate her own hand, and if she was going to run out of one, it was certainly the safe, blue ones. But then she decided it was more important to build good habits, and pulled out a blue-labeled bottle before carefully hiding the crate under her spare gym bag. She turned and took a deep breath, facing the low locker room bench and the door. She slid off her panties, and her musk filled the room. The thin cloth was drenched. She uncorked the bottle, closed her eyes, and gulped down the shot of liquid in a single gulp, expecting the standard icky medicine taste.

Instead, the potion didn't taste of anything except...warmth. It was like drinking a sultry summer afternoon. It made her head spin with arousal, and she instantly became aware of her nipples, now rock hard against her bra. Then the heat gathered in her groin, and she felt heaviness and an utterly unfamiliar sensation of length and...readiness. She opened her eyes and looked down to see her new cock.

It was a pony cock.

She admittedly wasn't highly familiar with either human or equine penises from intimate experience. But she'd done the standard sex ed at both schools, the standard comparing equipment with colts, and the not-so-standard dating Flash Sentry for power. So she knew enough to tell that the shaft she now sported in front of her still-dripping pussy was undoubtedly the one she'd have gotten had she taken the potion in Equestria. The mottled, veined shaft was the same color as her fur would have been, slightly darker than her human skin. Her fur even coated the heavy, full balls. The flared head was unmistakably equine, ready to seal the passage of her mate and ensure none of her (admittedly sterile) seed escaped. It looked smaller than pony cocks, but she assumed by virtue of this body's vertical orientation. It was as long and slightly thicker than Flash's, which physically she had enjoyed just fine, so she assumed no human girls would find it lacking.

The thought of plunging it into the warm pussy of one of her human friends made the urgent heat throbbing in the new member redouble. The only question now was who she'd think about while she stroked herself to her first ejaculation. She closed her eyes and started fantasizing. Maybe Applejack, with her muscular farm body? She'd seen her friend's rear in just panties in this very locker room, and it was something to behold.

Thinking about that ass, she began running her fingers lightly over the firm flesh of her new cock. Even the light contact was delicious, and now that the cock was hers, she found herself more fascinated by it than she'd ever been with Flash's. Despite the glorious firmness, it still felt powerfully alive, warm and slightly soft. And the edge of the flare and the large opening at the front felt fascinating to touch, and mired her in pleasure.

She imagined Applejack bending down, simple panties stretching over her firm ass cheeks as she reached for the floor, the outline of her pussy just visible through the fabric. She imagined walking up behind her friend and gently pressing her hard shaft between those cheeks. She ran her hand more firmly along the shaft, but it didn't slide as smoothly as she wanted in the absence of a lubricated oriface. She thought of the hand lotion she kept in her locker, and opened her eyes, preparing to stand...

...only to see Fluttershy staring at her wide-eyed, one delicate yellow hand reaching under her skirt.

Both girls stared at each other for a moment, motionless. Sunset couldn't decide what to say. Finally, though, her arousal, and Fluttershy's hand still held beneath her skirt, made up her mind.

"Enjoying the show?"

"Oh um Sunset, I uh, that is...yes."

Fluttershy's wide eyes never left Sunset's rigid member, and Sunset could swear her hand moved slightly under her skirt.

"What are you doing here?" She asked.

"Well I always stay late to feed the animals in all the classrooms. I just saw you hurry through the halls, and I was worried about you. Are, uh, are you okay? You didn't always have...that, right?" Fluttershy still hadn't raised her eyes, and her normally pale face was nearly as pink as her hair. Sunset found it adorable.

"No, I didn't," Sunset said. "Twilight was telling me stories about some magic they have in Equestria, that does, uh, well, this. And I thought it sounded really nice. She found out a way to send me potions that do the same thing. They just came in and I wanted to see if they worked. Well, they do. And I guess you're glad, too."

"B-but," Fluttershy managed. The pink had spread to her neck and shoulders, bare under her tank top. "It looks like, like..."

"A pony's, I know," Sunset said. "I guess the magic took it from my true form, even here." She shrugged.

"Oh." Sunset could swear she detected a little moan in Fluttershy's voice. She was about to ask why her friend had just watched, when Fluttershy continued. "I, uh. I'm sorry I didn't say anything. But, uh...well, I'd never do anything, since they can't talk and agree, but I really like stallions. Like, really like them." She was quiet for a bit again. "Can I look at it?"

"Uh, the potion does make me really horny, Fluttershy. I'm not sure that's a good idea."

"Please?"

It was hard enough to turn Fluttershy down at the best of times. Hopelessly horny and increasingly aware of just how adorable she was didn't count as the best of times. Sighing, Sunset leaned back and spread her legs. "Fine."

Seemingly instantly, Fluttershy was between her legs, eyes glued to the orange organ. It stiffened under the scrutiny, and under just how sexy Fluttershy's wide eyes were. Sunset didn't want to take advantage of her friend, but she couldn't ignore that this was increasingly resembling a fantasy. While Fluttershy's right hand remained at her own crotch, she reached out her left and gently ran her fingers over Sunset's shaft, much as she herself had just been doing.

"Wow, it really is a stallion's," Fluttershy murmured. Her right arm shifted, and she moaned. She closed her hand tighter on Sunset's shaft and noticed the same lubrication issue. Rather than stopping, though, she brought her hand to her mouth and spat on it before returning it to Sunset's pony cock. Now coated in warm fluid, it slid deliciously along the shaft. Sunset had never felt anything like it, and let out a loud moan as her head became even swampier.

"Fluttershy," she managed, "I am very sensitive right now. If you keep doing that for long I'm going to make a mess."

To Sunset's shock, Fluttershy looked up into her eyes, still blushing bright pink, and smiled. Still stroking Sunset's cock, she removed her other hand from under her skirt. Sunset couldn't help noticing her fingers glistened with fluids. Fluttershy licked them clean, then still wordlessly yanked off her tank top and threw it in the corner. She'd not been wearing a bra, and her small, perky breasts and erect nipples nearly drove Sunset over the edge on their own. The new sensations in her cock were nearly unbearable. Then Fluttershy delicately spit on the head of her shaft, and ran her hand firmly over the entire top, trailing her fingers along it, before returning to pumping the shaft vigorously.

It was too much. Her flare swelled. "Shy," she yelped, "I'm..."

"I know," Fluttershy said, smiling, and then Sunset groaned and her first rope of cum blasted out, directly into Fluttershy's open mouth. The sight of it dripping out of her lips and down her adorable chin was too much. Sunset thrust forward involuntarily, the motion lowering her cock's flared tip, and unloading several more ropes all over Fluttershy's chest before her orgasm finally subsided.

Sunset sat panting. She'd never felt anything so intense. Fluttershy seemed either enraptured or stunned, sitting with eyes half open, thick semen dripping from her lips and down her chest. Several ropes had hit her right on the upper swell of her breasts, and hung suspeneded from the rock-hard nipples. Fluttershy licked her lips, gave a little smile, and opened her eyes. Sunset's cock remained, and remained hard. She still felt ready, and her magical balls still felt heavy.

"It's still there. And um, ready." Fluttershy said.

"Yeah, Twilight mentioned this," it was Sunset's turn to blush. "It's powerful magic, it lasts two or even three times. It was made to let mares mate with each other, but this potion's sterile. It's okay, I was just going to use my hand, that was nice, but I'm sorry I got you all-" Fluttershy cut her off.

"Oh no Sunset, I would never leave a fellow creature in need." She got to her feet and moved to the opposite bench. Sunset's eyes widened and she felt if anything even stiffer, suspecting her fantasy was about to really come true. Facing away from her, Fluttershy reached under her skirt and pulled off her simple white panties, throwing them in the pile with her top. The scent of her musk filled the locker room. She lay over the bench on all fours and lifted her skirt. Her rear was thin but perfectly shaped, and beneath it Sunset could see the fringes of her wild pink pubic hair - untrimmed, hippy style, of course - peeking around her tiny-looking slit. It looked so small and innocent Sunset wasn't sure she would even fit, but Fluttershy's fingers had left obvious wetness on the lips and just outside it.

"There there, you poor thing," Fluttershy's calm voice was somehow intensely erotic. "All ready to go and no mare around to help. It's okay. Come here and let me take care of you."

The voice and her arousal combined to leave Sunset unable to resist. She stood and cast off her skirt, then fell to her knees behind Fluttershy, preparing to mount like a pony. She was about to press the tip of her tool to Fluttershy's waiting sex when something occurred to her.

"Fluttershy, is this your first-"

"Shhh, don't worry my stallion," Fluttershy pressed her rear back, and a flood of moisture tumbled from her slit on to Sunset's eager head just at the slight contact. "I'll be fine. Just let Mama Fluttershy take care of you." She pressed back a little more, and the damp covered the whole head of Sunset's cock now. She gave up, but she wasn't going to let what she suspected was her friend's first time be too rough. Mustering all her willpower, she slowly pushed herself inside.

It was everything she'd hoped and more. The heat and moisture surrounded her, and the feeling of being so deep inside her friend was sublime. Intimate and sexual all at once, she felt like she was flying. She moaned.

Halfway in, Fluttershy gasped and flinched, and Sunset stopped. A few moments later, though, he friend moaned again, and began pushing back.

"You poor thing," Fluttershy murmured. "This wonderful mmm, cock, and those big heavy uh, balls, and no mare in sight. It's okay, though, I'm here. I'll be your brood mare, oh yes."

Sunset groaned, and bottomed out. Slowly she began thrusting. She'd never rutted as a pony, but even being on the stallion's side, this felt natural. She pulled off her top and let her breasts rest against Fluttershy's back as she pushed all the way inside her. Being completely surrounded was her favorite, and felt just as right as she'd thought it would. Unused as she was to the new sensations, she was nearly there already, and began to pull out. Fluttershy pressed back towards her as she did.

"Fluttershy, I'm really close."

"I know you silly stallion. I told you I'd be your brood mare, give me all of that lovely seed. Please."

Something about the meek, tiny "please" did it. Sunset felt herself flaring, and drove all the way inside again, pressing Fluttershy hard to the bench with an eep that sounded delighted. Then she was coming again, rope after rope pouring into her friend, sealed off by her flare. Fluttershy was sqeaking, a sound that Sunset might have mistaken for pain if not for the constant orgasmic contractions around her pulsating organ.

She came more than Flash ever had, more even than she thought a stallion would, burst after burst of semen flooding into Fluttershy's petite body. She wondered if the magic was spending some of the mass of the magical cock itself as seed. She felt it building up in front of her shaft, unable to get around the flare. Then Fluttershy shuddered and let out a loud squeak, and the pressure eased. She realized, prompting another orgasmic convulsion, that some of the seed must have flooded through her friend's cervix and into her womb.

Finally with a gasp it was over, and the cock disappeared entirely. Fluttershy raised her rear as Sunset toppled off, though not before a large blob of cum dripped out. Then she flipped over and lay on her back on the bench, panting, as Sunset fell to the floor. She looked up and saw Fluttershy had raised her legs and had a hand on her belly, which was slightly but obviously swelled with the load in it. They sat panting and recovering for what felt like a long time, silent.

"Um, yay," Fluttershy finally said. "Thank you, Sunset."

Sunset blinked, then laughed. "No, thank you."

"No, what I mean is," Fluttershy paused. "I don't really know what came over me. That was a...a fantasy. And it was...nice. But..."

"I get it," Sunset said. "It was the heat of the moment, and now you feel weird."

"Yes."

"It's okay. I don't expect to do that again. If you want to you can ask me, but I don't expect anything. And I'm still your friend even though I know you look cute naked." She looked at Fluttershy's skirt, drenched in sweat but still fastened around her waist. "Well, mostly naked."

"And even though you took my virginity with your pony penis?"

Sunset laughed.

"Yes, of course, even so. Now I need a shower, and I think you do too. And let's go home, and if you want to talk about this later, let me know. Otherwise, it was a favor between friends. Okay?"

Fluttershy smiled, and got to her feet. Her belly slowly flattened again as oozing gobs of cum trickled down her legs. She blushed again.

"Of course, Sunset. Let's do that."

Fluttershy showered longer than Sunset did, and she didn't want to force awkward goodbyes. So she just called one out as she dressed, then took a couple of the blue bottles home with her. Just in case.

In Which Sunset Discovers Some Unlisted Side Effects

Sunset slept restlessly the first night. She'd intended to write Twilight about her first experience with the potion, but found herself worrying about Fluttershy's reaction after she came down from the high. Certainly she didn't feel right sharing until she was sure her friend was okay.

Of course, she also couldn't help snapshots of the day rising to the top of her mind. Fluttershy on the bench, presenting her shy sex like a pony. Fluttershy's small breasts covered in her cum. Fluttershy with her hand on her swollen belly. It got so bad she had to drink one of the two potions she'd brought home and stroke herself to two shattering orgasms in her bathtub, thinking of Fluttershy both times, before she could finally pass out, still filled with a mix of lust and dread.

In the morning the lust had faded, but she was so worried she'd damaged her friendship she could barely eat breakfast before rushing off to school just to see what happened. She did mix the potion into one of her water bottles before she went, though. It seemed safer than carrying the glass bottle in her backpack, or trying to get to her locker should the need for the potion arise.

As it turned out, she needn't have worried about Fluttershy. They saw each other in homeroom, and they smiled and greeted each other just like always. She was in some ways a bit disappointed; while she didn't want to date Fluttershy, she wouldn't have minded a repeat performance. But for the most part, she was just glad they seemed to have avoided awkwardness, though she was sure there would be a bit, at least for a day or two.

Quickly it became a routine day, made slightly surreal by the knowledge of the real Equestrian magic waiting in her backpack, should she have need of it. She didn't through lunch, but its presence colored her whole day. She'd always known Canterlot High had plenty of attractive women in attendance, but it had always been a more detached knowledge. Now she found herself taken by idle fantasy frequently merely at a seemingly random sight. She wondered if this was what Snips and Snails had to deal with.

It came to a head right after lunch, in history class. Of her friends, only Rarity shared the class with her, but Sunset found herself unable to take her eyes off of her. She'd never quite understood how sexy the combination of beauty and class could be. She found her mind drifting from the Battle of Yorktown to thoughts of Rarity writhing on her cock, still fully clothed and immaculate. Or Rarity with a single streak of cum in her otherwise perfect hair, and one on her lipstick-red lips. As these thoughts filled her, she felt herself fill with a familiar sticky heat as her pussy got to work ruining another pair of panties.

And then the panties were suddenly too small, and her erect pony cock was pressing eagerly out of the top.

She barely fought back the gasp. Twilight hadn't mentioned anything about it appearing without the potion! But she felt like she'd just drunk one, and her cock was certainly as eager for action as if she just had. Anyone who looked under her desk would be able to tell something was wrong!

In a panic, she grabbed her bag and stood up, holding it over the front of her skirt. She suspected she'd look convincingly distressed.

"I'm sorry Ms. Star," she said, "I think lunch disagreed with me, I have to go to the bathroom."

She hurried out as the teacher nodded. She ran to the bathroom and into the largest of the stalls. Hopefully if she just took care of this here, she'd be able to make it through the day, and then ask Twilight why the dick had come back. She pulled off her panties, and was trying to figure out the best position to sit in to make sure she got at least most of her cum into the toilet, when she heard the door open. She grabbed for her panties again in a panic, hoping Ms. Star wasn't coming to check on her.

Instead, Rarity's voice filled the bathroom.

"Sunset darling, are you all right?"

She gulped, not sure if she was relieved or not.

"Yes Rarity, I'm fine, thanks, I just need a moment."

"Are you sure I can't help?"

"Uh, pretty sure, thanks."

There was a long pause, and Sunset thought she must have not heard Rarity leaving. She pulled off her panties again and settled for sitting facing the door, just admitting she'd have to clean up a lot of cum with paper towels. Then just as she was about to begin, Rarity spoke again.

"Sunset, Fluttershy told me what happened last night. I'd really be glad to help. May I please come in?"

Sunset gulped. "You're sure you want to help?"

"Of course darling, what are friends for?"

I didn't think they were for this! Sunset almost said. Instead she reached forward and unlatched the stall door. "Okay, come on in."

Rarity daintily stepped in, looking perfect as always. She shut and latched the door, then turned to Sunset and her eyes widened. "Oh dear, I didn't realize...why did you drink another potion?"

Sunset nearly slapped her head. Of course! Rarity couldn't have known the cock had returned on its own. She just thought Sunset was upset and wanted to talk. Hastily she pulled down her skirt as best she could.

"I didn't! That's why I ran out of class! It just appeared! I need to ask the Princess what it means, but I can't stay in class like this!"

"Goodness no, I can't imagine you could hide that. And it must be terribly distracting, from what Fluttershy told me. And here I thought you were just having regrets! But tell me, what made it come back?"

"Uh, just, well...I uh, got kind of horny."

Rarity looked away and nodded. "I see. Well, we have seen magic transform us spontaneously before, based on our emotions. Perhaps the potion triggered something like that. Did anything in particular cause you to get ah, horny?"

"Well, I've been getting hotter all day just thinking about how I can get this thing any time I want. I really like it. Like, really like it. Not just the feel, but the idea, you know?"

"I do not, I am quite happy with my body. But there are certainly people who feel the body they were born with does not entirely suit them. There's nothing wrong with that, if indeed that's the position you find yourself in. But please, Sunset, if we want to solve what causes this any information could be useful. If you've been getting horny all day, what pushed you over the edge this time?"

"Uh, well...it's kind of awkward..."

"Nonsense, I am your friend, and we will solve this together."

"You did."

"I beg your pardon?"

"You just looked so good! I couldn't help...thinking about things."

Rarity laughed. Sunset frowned at her.

"Why's that funny?"

"Why my dear, because ever since Fluttershy told me, I've been driving myself to distraction thinking about you! Can you imagine how difficult it is? I love women's bodies. For fashion we simply have men beat. All day I think about how to make us look gorgeous. Accentuate this, minimize that, show off those. But sexually, well darling, I simply crave being filled up with a nice, warm shaft." Rarity walked over and fell to her knees between Sunset's leg. "Now here you are, a beautiful woman. One of the most attractive in the school, if I do say so myself." Rarity ran her hands lightly on Sunset's chest. "Your breasts particularly are to die for. And now, between your legs," as she spoke, Rarity moved her mouth closer and closer to Sunset's firm cock, "you have this glorious piece of meat. I've been thinking about it all day, and nearly touching myself. Well, mostly nearly." Rarity kissed the head of Sunset's cock, causing her to squeak in surprise, then the squeak became a moan as Rarity ran her tongue teasingly across the head.

"Rarity," Sunset said, "these potions make me incredibly hot. If you don't stop right now, I'm going to make a huge mess."

"I see." Rarity paused. "I do hope Fluttershy was telling the truth when she said it was sterile?"

"Yep, blue label has contraceptives in it, not just the studding potion. It's totally safe. Well, or it was with Fluttershy. Apple Bloom said the contraceptive wears off after a while, and I dunno if this is a copy of the whole spell or what."

Rarity glanced at Sunset's bookbag.

"Is it in this water bottle?"

Sunset nodded. Wordlessly, Rarity handed it it to her. Before Sunset could ask her question, Rarity reached under her skirt and pulled off her panties - black lace, to Sunset's happy surprise.

"Drink up, darling. I'd really rather not get knocked up."

"Rarity, what are you-"

"Oh don't be silly. I told you I'd been thinking about this all day." Rarity reached down and lifted Sunset's skirt. "Oh my, how exotic. Drink up, darling! We're wasting class time!"

Sunset was still nearly in shock. If she'd been surprised by Fluttershy's eagerness for her cock, she'd certainly have never expected prim and proper Rarity to want it so.

"Oh, very well, I suppose you'd like to see what you're getting yourself in to."

Rarity turned and flipped her skirt, spreading her legs and bending over slightly. From behind there was no sign of her no doubt well-kept pubic hair, but compared to Fluttershy's shy sex, hers was a bud just opening, two perfect lips slightly parted, revealing just a hint of glistening pink inside. And a lot of fluids - she clearly had been fantasizing all day. Her ass was fuller than Fluttershy's, but still tight, and parted just enough to reveal a glimpse of the pink rosette. She probably bleached.

Rarity looked expectantly back over her shoulder. Sunset chugged the water bottle. Her cock somehow stiffened even more.

"Mmm, that's right." Rarity settled her legs over Sunset's, facing her. She lifted the front of her skirt. She did indeed have a tightly trimmed strip of dark blue hair above her neat sex. Both girls watched the tip of Sunset's pony prick hovering at her entrance. She could feel the warmth and wetness, and shivered.

"A lady keeps up appearances," Rarity murmured, "but we all have our private desires." In one confident motion, she sank herself on Sunset to the hilt.

Rarity moaned. Sunset was briefly too stunned to do anything, then she let out a gasp. She was surrounded in Rarity's tight warmth, and the angle allowed for even deeper penetration than she'd gotten with Fluttershy. Rarity's delicate lips rested on her full balls, leaking wetness on to them.

"Is this what you were fantasizing about, hmmm? Come now, tell me."

Sunset gasped a few times before she found her voice. "P-pretty much. You always look so classy, I was imagining...imagining being inside you, but not messing anything up, or just a little."

"Oh don't worry," Rarity said, "you won't mess the outfit up at all. You won't be leaving me until you're completely spent." She sighed. "Fluttershy told me about the effect you had on her, and that was only one load. And I have been watching my figure. But I'm willing to make that sacrifice for my friend."

Sunset shuddered.

"It'll all come out when you stand up though."

Rarity smiled, and Sunset shuddered as the entire length of Rarity's pussy convulsed, seeming to massage her cock.

"Kegels, darling. Nothing gets out without my say so. Of course I won't be able to hold it long, but long enough." She laughed. "Of course, if you listen to half the school, I should have just taken you in my rear, then it never would have come out."

Sunset laughed at the absurdity, then transitioned to a moan as Rarity squeezed her again. Overcome with lust, she pressed her lips forward towards Rarity's own.

"Mmm, lipstick dear," Rarity said, twisting her head. Sunset swerved to try to find a place free of makeup, and placed a wet kiss on the side of Rarity's neck. For the first time her composure broke, and she growled. Encouraged, Sunset began working over her alabaster neck with her lips. Rarity responded with low, throaty moans, and intense clenching of her pussy. Sunset soon found herself nearing orgasm, and felt her flare stiffening.

"Goodness," Rarity panted, "that's quite the feeling. I take it this means you're close?"

"Mmmm-hmmm," Sunset nodded, still working Rarity's neck with her lips.

"And you expect the load to be....quite large?"

She nodded again, more urgently.

"V-very well," Rarity gasped, and reached down and unhooked her skirt, removing the restraint from her belly. "Oh Sunset, I want this very badly."

That was enough for Sunset. Her flare fully hardened, sealing Rarity's passage, and Rarity in turn placed a delicate hand over her mouth as, if her convulsions were any indication, her own orgasm took her. Then the seed was rushing again in powerful bursts out of Sunset's cock, pumping into Rarity's thrashing tunnel. Sunset felt the pressure grow and grow again as her cum built up, trapped between Rarity's cervix and the flare of her pony prick. She realized gravity might be preventing it from going through that last barrier. But Fluttershy had seemed to enjoy it, and her balls were still heavy. If she pulled out now, she'd certainly ruin Rarity's outfit, and with it their chances of getting safely back to class.

In desperation, she stood up, lifting Rarity and bringing her eager body even with Sunset's still pumping organ. Now no longer fighting gravity, she felt the pressure ease as her seed surged deeper into Rarity's body. Even around her hand, Rarity couldn't quite hide a deep moan, and she clung desperately to Sunset as they rode out their orgasms together.

It seemed to go on forever, far longer than it had with Fluttershy. Whether it was because of the additional potion, or just because she was emptying everything into Rarity's very eager body in one go, she couldn't tell, nor did she care. The feeling of pumping her friend's lithe body full was overwhelming, and when Rarity looked down, wide-eyed, at her own obviously swollen belly, her expression drew another large burst from Sunset.

Finally she was done, and her magical organ vanished. True to her word, somehow nothing leaked from Rarity's obviously full pussy.

"See darling. Exercises. Still," she hurried to the toilet and pressed some paper towels against herself before letting the load flow out in a series of audible plops. It took some time.

"Well," she said, "I see Fluttershy did not exaggerate. That's quite the magic our Princess arranged for you. We'll have to do this again sometime."

Sunset looked for the perfect response, encapsulating her surprise that Rarity wanted to repeat, her eagerness to do so, her shock at how quickly her friend recovered, and her own slowness to do so.

"Buh," she nailed it.

"Oh yes, that was quite wonderful, I'd love to arrange a, ah, slumber party some time. If you're amenable, of course."

"Buh."

"Wonderful." She slid her panties back on and fastened her skirt, apparently completely drained of Sunset's load. "Well, I must get back to class. I'll tell them to expect you soon. Oh, and you really must tell the other girls. Not just in the interests of sharing, of course. If your magic is causing this physical change without the potion, it concerns all of us. They need to know. Ta!"

She swept out, every bit as composed as usual.

"Buh," Sunset said to the door, unwilling to mess with success.

It took another ten minutes or so before she was ready to return to class.

In Which Sunset Engages (and Ejaculates) in Scientific Inquiry

"So that's basically the story," Sunset said, blushing heavily. It was the day after she'd fucked Rarity in the bathroom. All of the girls shared an elective as the Rainbooms, practicing their music alone in the band room right after lunch. Today, she'd taken the opportunity to fill them in on her new transformation, though without saying she'd already inseminated two of their number, and fully intended to pound Rarity again as soon as requested.

"Wowee," Pinkie said. "And it comes out when you get hot?"

"I dunno," Sunset said. "It did yesterday, but it's such a new thing, it's always sort of hot knowing I can do it whenever I like," she blushed harder, "and it hasn't happened yet today. I don't know if I'm getting it more under control, or what."

"It can't be a coincidence that you all sometimes grow pony ears and tails and now you, uh...get the other thing more often than you should," Twilight said. "It's got to be a manifestation or interaction of the magic you all draw on, be that terrestrial or residual Equestrian power from when the Element was here. And who knows if the potions are exacerbating the effect? You should come to my place right after school. We'll see what my magic detecting machines can do. I've got a new version of the Passive Etheric Field Fluctuation Detector. It's bluetooth!"

"I don't know what that means," Sunset said. "But I guess we do need to see what we can find out about the magic and why it's spontaneously reappearing."

"Exactly," Twilight said. "Sure, right now it's harmless, but who knows if that will change? Or if other things will start happening? And imagine how inconvenient it'd be if it happened in class! We need to get to the bottom of it, at least to make sure it's safe."

Inwardly Sunset didn't like the idea. The rigors of the scientific environment seemed unlikely to produce a spontaneous boner at all, and if it did appear, sitting around frustrated for the no doubt hours it would take to study it sounded like torture. Still, Twilight was right. Enjoyable though pumping Rarity full with the unexpected member had been, she was a bit concerned about the magic not working as expected. And if the potion was having any kind of effects like that, it'd be important to know about it now, before using it any more. So she agreed, and made plans to meet Twilight in the locker room after school, since both decided having some of the potion on hand to study might be useful.

None of her other friends had much to say to the revelation. Fluttershy just blushed furiously. Rarity began sketches on modified panties that might be able to better deal with any unexpected horse cock manifestation, both in terms of concealment and comfort, though there was of course only so much she could do. Rainbow Dash joked, as was her way, and Pinkie just grinned. Applejack was quiet, which worried Sunset, but when she asked, Applejack smiled at her and said it was fine, just weird.

Disappointed though she was in what that seemed to indicate about her chances of living out her Apple-related fantasies, it did put Sunset's mind at ease. So the girls went to their other classes on good terms.

The rest of the day passed uneventfully, with one exception. Right before last period, Sunset noticed her water bottle missing from her bag. Unfortunately, after a frantic search through the last few places she'd been, she found no sign of it. She hadn't taken it out all day, so hoped she'd just left it at home, but one way or another, it seemed to be out of her hands until she got back that evening.

So with nothing else to be done, she finished up last period, then went to meet Twilight in the locker room. She opened her locker and the crate, and Twilight pulled out a vial with great excitement.

"Oh, wow, look at that text! It's really not like anything on Earth! But I can totally tell it's writing. You said the yellow was without the contraceptive and the blue was with?"

Sunset nodded.

"I guess that makes sense, if we're all so similar we have analogues, it's not surprising we have similar color coding, yellow for caution, and blue is calming. Good mnemonic." Twilight took five of the blue potions and two of the yellow. "It looks like you have plenty of these of both kinds, you don't mind if I take this many, right?"

Sunset shook her head. "I can always get more if I need to. But why do you want so many?"

"I'll want to do several tests on the base formula, and might use a lot. And it'd be interesting to compare the other. It seems unlikely the contraceptive is just a biological agent, since the spontaneous generation of a penis is clearly magical, so I'm interested in how much my instruments can tell me about the difference. It might help me make them even better!"

Sunset shook her head, but grinned. "Sure, then, that's fine. Ready to go?"

Sunset still new relatively little about the Princess's human equivalent. Though she'd fit well, if awkwardly, in with their group of friends, they'd never really hung out after school. At least, not one-on-one. As a result, Sunset had never been to Twilight's house. It was smaller than she expected, and it also turned out both of her parents worked. Neither would be home for hours. Where Equestrian Twilight's parents were middle-class intellectuals, this Twilight turned out to be solidly working class, and, as far as Sunset could tell, significantly if benignly neglected. She felt it explained something about her...keenness, for lack of a better word, compared to her Equestrian counterpart.

It did make her wonder where the money for all the stuff in her basement lab came from, once she saw it, but she decided this might be a question for another time. The walls were covered with vials, books, and boxes of equipment. In the middle of the room was a work bench with a laptop on it and several truly esoteric looking devices.

"Wait here," Twilight said, and hurried off through a door. Before Sunset could think about disobeying, she came back in, struggling to push what looked like it was supposed to stand in for a hospital bed: a homemade wheeled frame carrying a narrow futon mattress.

"Wow," Sunset said. "What do you think we'll need that for?"

"I don't think we will," Twilight shrugged, "but you never know. It always pays to be prepared! But let's see what Ethyl 2 has to say."

"Ethyl 2?"

"Passive Etheric Field Fluctuation Detector Version 2 doesn't acronym very well. Anyway," she pulled a device from the table that looked, to Sunset, like a modified egg beater. "Remember when I scanned you all at school? I recorded all of your levels of magical energy both normally and during times when you 'pony up'. I'm interested to see if this changes anything." She opened the laptop and pressed a few buttons, and two lines appeared on the screen, looking very much like sine waves. One was blue and one red, and the red one was both higher on the screen and had a more significant amplitude than the blue.

"The blue is normal, the red is when you 'pony up'. As far as I can detect, when you do, your overall magical energy increases, and it also becomes more agitated." Twilight ran Ethyl the egg-beater-device slowly around Sunset at waist level. It emitted a strange whirring noise, and a green line crept across the screen, superimposed over the blue one.

"Okay," Twilight said, "your passive magical field is the same as ever. That's good. Or at least, makes it less likely the potion has had major effects outside the time the dick manifests. Have you noticed any physical changes besides the intermittent horse penis?"

Sunset laughed. "Certainly none as obvious. What do you mean?"

"The penis is clearly connected at least by nerves, since you can, um, masturbate it successfully," Twilight blushed a little. "If it's also connected to the endocrine system, it could be providing you with male sex hormones, or even equine hormones. That might have any number of effects from shrinking breasts to growth of muscle or hair."

"I haven't noticed any of that, no, but it's only been a few days."

"That's okay, fortunately we can check! Take off your clothes."

Sunset blinked. Twilight's voice said business, but she was blushing just a little, her cheeks shaded a darker purple.

"Excuse me?" Sunset said.

"Oh, um, I just meant I could measure it! I have your medical records, I can measure your bust and major muscles and compare."

"How did you get my medical records?"

"The Nurse Redheart has shameful cyber-security. It's okay if you don't want to I guess, but it'd be useful to know."

Sunset didn't exactly want to, primarily because she was concerned she'd get aroused and get an embarrassing erection. But though she loved her magical pony penis, she also liked her human young woman's body, and if she were disrupting it with strange hormones, she did want to know.

"No, it's okay," she finally said. "You're right, this is important to know."

Twilight watched the computer screen politely while Sunset stripped. She undid her skirt and let it fall to the floor, then her panties, then she pulled off her top and freed her breasts from her bra. Several times throughout the process, she thought she saw Twilight sneaking a peek, but couldn't be sure.

Sunset was particularly proud of her breasts. They were the most novel thing about her human body, of course, but she also thought they were one of her best features: not tiny by any means, but not so large as to be unwieldy in sports or saggy outside her bra. Quite the contrary, she found them shockingly and pleasantly firm even unaided. The medical feel of the lab, plus the slight chill in the air thankfully prevented her from becoming too turned on by stripping, though the chill air did make her nipples hard. Still, it could have been worse.

"Alright," Twilight said, pulling a tailor's measuring tape from the desk drawer, "ready?"

Sunset nodded and swallowed. Twilight measured her arms in several places, and her stomach and hips. She leaned down and gazed at her crotch, though not between her legs, before nodding. She looked too at her upper lip, and Sunset had to resist running a finger over it to check for errant hairs. Finally she put the tailor's measure around Sunset's bust, measuring it just below the nipples. Despite herself, Sunset shivered at the feeling of the chilly tape and Twilight's warm fingers just inches from her erect nipples.

"Sorry," Twilight blushed, but thankfully Sunset's crotch remained entirely feminine.

Twilight returned to the computer, leaving Sunset to stand awkwardly naked while she typed.

"You can lie down if you'd rather," she said over her shoulder. For some reason it did sound slightly less awkward, so Sunset did.

"Okay, good news," Twilight finally said, "if you're getting any weird hormones, they haven't done anything yet. As far as I can tell, there are no lingering effects of the potion."

"Other than that time it made me spontaneously gain a dick."

"Well, yes," Twilight blushed again, "other than that. Speaking of which, now I need to study it. So we need to see what makes it appear."

"Wait...really?"

"Of course. How can we see what changes when you have it unless it shows up?"

"But...I told you it makes me..."

"Very horny, I know. I'm sorry, but if you want to figure this out you'll just have to deal with it for a bit. It won't take long, and then you can take care of it."

Sunset sighed. "Fine. What's the plan?"

"I want to see how specific the stimulus needs to be. I talked to Rarity and she told me, ah, quite a bit. You were thinking of her when it appeared yesterday, right?"

Sunset's face was now burning up. "R-right."

"Okay, so I'm going to try to create escalating trigger conditions to see what causes it to appear. If all else fails we'll just have you take a potion, but obviously a repeat of the spontaneous event would be better." She walked over and placed Ethyl 2 on the bed next to Sunset. "We'll also measure your magic to see if it increases when the dick appears."

She turned the laptop screen towards Sunset. On it, a video was playing, featuring a woman on her knees, rear in the air and slightly spread.

"Are you showing me porn?" Sunset nearly laughed.

"It seemed the least direct way to try to arouse you," Twilight muttered.

She let the video play for a few minutes, but when Sunset showed no effect, other than a brief giggle, she turned it off.

"Okay, let's see if the connection to one of your friends is important, then."

She pressed a few buttons on the laptop, and the magical energy graph appeared in a small window in the bottom of the screen. Then she brought up another video in the main window.

"Rarity?!" Sunset was aghast.

Indeed, on the screen was Rarity, with a faint smile, standing in the locker room.

"We had a free period together," Twilight said. "She told me all about yesterday, and agreed to do a brief video once I explained the project."

"She's way kinkier than she seems," Sunset muttered.

Twilight ignored her and started the video.

"Hello Sunset darling," Rarity said from the laptop's speakers, "Twilight asked me to help make a video to help with her experiment," she grinned, and took off her jacket, revealing a low cut top. "Naturally, with how much I enjoyed our time yesterday, I couldn't refuse." She pressed her arms together, creating a really unfair view of her cleavage. Sunset's nipples hardened. "I must tell you darling, I've been thinking of that wonderful cock of yours all day." On the screen, Rarity pulled off her top. Her generous breasts were held back only by a pearly white lace bra, which she quickly took off. Sunset had never seen them freed before, but it was worth the wait. Larger than Sunset's own, they were nonetheless firm, and her nipples were hard and dark on the surprisingly small aureola. She began running her hands over them. Out of the corner of her eye, Sunset saw Twilight bite her lip.

"Oh yes," Rarity went on, "why, the only reason I haven't jumped you yet is that I want to do it right." The camera pulled back, and Rarity turned around, slowly raising her skirt over her matching white thong panties. "I want you to myself for a whole night. I want to fall asleep together all tangled up, exhausted from our indiscretions." She pulled down the panties and bent over more, then spread her sex with her fingers. Sunset was soaking, and was sure Twilight could smell her musk on the air. Still, no dick emerged. The video cut off.

"Well," Twilight said, her face nearly Imperial purple, "only one more thing to try. My hypothesis was that the physical presence of the one you were thinking of was important, and that's why it appeared only when you were in class with the girl you were thinking about."

"Wait, did you bring Rarity here or something?"

Twilight shook her head, and began unbuttoning her vest.

"Wait, you're going to--" Sunset cut off as Twilight glared at her, clearly already embarrassed.

Twilight shrugged off the vest and placed it on the work bench. Then she carefully undid her tie, doing the same. Sunset had never realized how many buttons were on the girl's outfit! She began on the next set, those on her sky blue undershirt. Every one she undid, a little more of the flesh beneath became visible, and Sunset found herself straining to see the unintentionally slow striptease. Twilight clearly never went to the beach - she was slightly paler lavender under the shirt. Finally she undid the last button. Sunset also hadn't noticed how skinny the girl was; she didn't seem unhealthy, but her stomach was even flatter than Fluttershy's, and it didn't look like her simple white bra held back much more in the way of breasts, either.

This impression soon proved correct. Twilight, her blush spreading to her neck and shoulders, carefully lay aside the shirt and reached back to unhook her bra. Her breasts fell free. They each looked right about a handful, and Sunset found herself quite keen to test that observation. As she watched, Twilight's nipples hardened and grew until they were substantially larger than Fluttershy's or Rarity's, and Sunset thought they looked fun to play with.

Twilight reached down and unbuckled her skirt. Again rather than letting it fall to the floor, she carefully placed it on the table. Her panties were also a simple, functional white, and she began removing them carefully too, but it seemed like something went wrong, and they slipped from her fingers and fell to the floor.

"Oops," she said, and turn around before bending over to pick them up.

Sunset wondered if she just really liked human butts, or if all her friends really did have fantastic ones. Twilight's was on the small side, but firm and tight, and she could imagine pressing her cock between the cheeks. As Twilight bent her pussy peaked out between her skinny thighs, and Sunset could definitely imagine pressing between them, her cock sinking into Twilight's body, the other girl's gasp as the shaft pressed into her...

The laptop let out an alarmed beep, and Sunset's mind again filled with the fog of lust as her pony prick appeared with a glimmer of red magic, just like her ears. Twilight shot to her feet, panties forgotten, and went to look at the screen. Absurdly, the magical line had formed a shape looking very much like a dick and balls before settling in to the normal "pony up" pattern.

"It worked!" Twilight nearly yelled, and began rummaging in drawers.

The next what felt like half an hour was a peculiar form of torture for Sunset. Twilight rushed about shamelessly, breasts and ass jiggling tantalizingly as she gathered supplies and measured every dimension of Sunset's cock, as well as taking numerous photos and running Ethyl 2 all around it, as well as several other devices. At first the only indication she remembered she was herself stark naked was her blush, but as the measurements went on, she began stroking her nipples and pussy with her off hand. Sunset wasn't even sure she knew she was doing it, but she didn't trust herself to speak with how aroused she was. Besides, the longer Twilight's measurements took, the longer before she could ask which beaker Twilight wanted to collect her cum in and relieve her throbbing cock.

Finally Twilight went and entered all the data in the laptop. Sunset was about to ask her if she was done, when Twilight picked up a tiny tape recorder, the kind Sunset had only seen in old movies, and began moving some papers aside. Sunset's curiosity was finally too much.

"What's the recorder for?"

"I don't expect to be able to take detailed notes once you're inside me, so I'm going to have to dictate them."

"Wait, you want me inside you? I figured you'd want to collect the cum in a beaker or something."

Twilight spread her legs slightly apart and placed a large glass bowl beneath her crotch, then lay down on the part of the desk she'd just cleared, revealing her slightly parted, glistening pussy lips and her glorious ass.

"I'll get it on the way out. Rarity told me that your unusual penis sealed her off and forced your semen past her cervix, leading to a visible bulge," she stretched the tailor's tape around her flat stomach and noted the number in the laptop. "By measuring the effect I hope I can figure out how much entered the womb and how much remained in the vaginal canal."

"Why is that useful?"

"Why would I only want to know something if it's useful? And it's a totally unique penis on this planet! It's similar to a horse's but not identical, size aside. I can compare how it feels."

"Wait, you know how a human penis feels inside you?"

"Well, not a real one, but I've experienced a wide variety of very accurate models."

Sunset rolled her eyes.

"Fine." Twilight placed one of the blue labeled bottles next to her on the table, then reached behind her and spread her pussy lips with her fingers. "I do want to do all that science, but the real answer is that I've been looking at your naked body and erect penis for half an hour and I'm aroused nearly out of my mind. So if you want to, please come and put it inside me already."

Sunset couldn't deny she wanted to. She got up from and moved behind Twilight. She chugged the potion, then pressed herself slowly inside. She could believe Twilight had extensive experience with "accurate models" - she began sinking in to her dripping opening easily, and moaned.

"Subject is very well endowed," Twilight panted into her recorder as Sunset sank in, "and unique phallic nature is easily distinguishable. The flared head has a - ah - strong and pleasant effect on the vaginal walls."

Sunset reached around and cupped one of Twilight's breasts in her hand, pressing steadily forward.

"As observation noted, subject has a slight medial ring, though not as pronounced as in terrestrial equines. Still," here Twilight gasped, "it is possible to feel it entering the vagina."

Sunset found herself drawn in by the narration. Twilight's large nipple was firm against her palm, and she squeezed and stroked it, eliciting a gasp. It was followed by a moan as she bottomed out, slapping her full balls against the lips of Twilight's sex.

"Subject's testicles feel heavily loaded, which agrees with Rarity's report. Their weight is noticeable as they press against the labia, even with a horizontal entry."

Sunset felt she must be getting at least a bit used to her new cock. Twilight wasn't any less sexy than Fluttershy or Rarity, but while she felt her orgasm was close, she had few good thrusts in her. She began deep strokes, pulling out just to the medial ring before plunging back in.

"Ah, subject is engaged in deep mating strokes," Twilight was panting into the recorder now, "and the medial ring and head flare massage the vaginal walls. Oh it's incredible. The flare hits my g-spot when she strokes out, this is way better than any of the dildos. I'm going to cum in like two more strokes."

This was too much for Sunset. "So am I," she muttered, and felt her flare deploying in preparation. Beneath her, Twilight began shaking and her pussy clenched hard.

"The, ah, hardening flare, ah, is hitting me just right, I'm oh God this is so good, this is the best I've ever cum. I can tell I'm sealed off, she's about to start loading me up. Oh I'm ready. Sunset, make sure to go as deep as you can!"

Sunset obliged, burying herself in Twilight as she began pumping her seed inside the lithe girl.

"Oh, I can feel it in my vaginal passage," Twilight reported, "there's so much of it! I can feel the pressure on my cervix, but it can't get out any other way. Mmmm-oh, that hurt a little, but the good kind, like fingernails or a nipple pinch. That must have been some going through. I wish I could feel it hitting my womb! Oh, there it is again, mmm this is nice I'm going to cum again, dear Lord Sunset, keep giving it to me!"

Sunset couldn't have stopped if she'd wanted to, of course, her magical balls emptying inexorably into her friend, far more than a natural cock could hold.

"Oh, I feel it now, sort of, just a pressure in my belly. It's so weird, but hot too." Twilight looked down. "It's like Rarity said, I can see it! And there's more coming!"

Twilight began shuddering again as Sunset rode out the last of her long, seed-pumping orgasm and her magical dick vanished. Quickly Twilight pressed a hand over her pussy, though a bit of sperm oozed out between her fingers. She measured her bloated belly and recorded the result, then squatted over the bowl, letting Sunset's massive load dribble out. When it seemed to be done, she poured it into a smaller beaker and placed it in the freezer. Despite the fading of her dick, Sunset had trouble taking her eyes off of the naked girl and the way her tight body moved as she hurried around the lab. She thought about what she'd just done to her, and shivered with naughty satisfaction.

"Enough for today?" Sunset asked.

"Oh," Twilight blinked. "Well, I suppose I don't technically need you for the next part, so you can go if you want, but I'm just getting started. And I was hoping you'd stick around, I could get a bit more data from you too."

Sunset shrugged. Her frustration had cleared up with her orgasm, and she had nowhere else to be.

"Sure, I guess. What's the next part?"

"This," Twilight picked up one of the yellow potions and, before Sunset could say anything, chugged it.

For a minute, Twilight only had a strange look on her face, then with a flash of purple magic, her own penis appeared. It was roughly the size of Sunset's...but it was a fully human, uncircumcised cock.

"Whoa," Sunset said, "you got a human one."

"Ugh," Twilight said, "you weren't kidding about the arousal, I can barely think strait! But I suspected this might happen. I think the magic doesn't read whatever magic made you a human, so it's giving you the penis your true form would use. As a full human, I get my own. Also, now we'll be able to see if my penis reappears in situations of arousal like yours does."

"Okay but uh, no offense, I'm not all that interested in having one inside me. And it's fertile anyway. What are you going to do with it?"

"I made it fertile since I want to compare samples of the fertile and infertile sperm to see if they're magically distinct." Twilight placed the rest of the potions next to the bed. "So I'll have to collect some of it. As for the rest, uh..."

Sunset rolled her eyes. "I just shot a massive load in you. You don't need to be shy."

Twilight was blushing furiously regardless. "I really like your breasts. Uh, do you mind lying on the bed and letting me look at them and uh, get off on them?"

Even if she'd been inclined, Sunset couldn't say no to that adorable blushing face. She lay down on her back on the bed, and Twilight crawled on top of her, resting her still-dripping pussy on top of Sunset's pubic hair. Slowly she began stroking her new cock, moaning at the sensation.

"Wow Sunset, I can see why you like this, it's totally different than having one inside you." She groaned and started stroking faster. "Also you're so lucky to have such big breasts and still have them so nice and full. They're just beautiful. They make me really hot."

Sunset felt herself warming at Twilight's words, and before she realized what was happening coherently enough to issue a warning, her own pony cock was back...having materialized hilted in Twilight.

"Mmm," Twilight sighed, rocking her hips, "I'd hoped that would happen. Now we can do two experiments at once. Sunset, drink two of the blue potions if you don't mind."

"Two?" Sunset was a bit distracted by the feeling of Twilight bouncing on top of her newly reappeared shaft.

"Well," Twilight panted, "we just found out that if you have a refractory period, it's very short, probably because you get new nerves and muscles every time the spell fires. Now I'm curious if additional potions have an effect on the etheric energy you release, which Ethyl 2 is still tracking, or on the volume of ejaculate you produce."

Sunset decided not to question a good thing. She quickly chugged both potions. The first, as usual, didn't seem to do much, but upon drinking the second, she felt warmth again gather in her balls, and they clenched and churned, feeling even heavier.

"I think you're right, I feel like I have even more than last time." She'd meant it as a warning, but Twilight shivered on top of her.

"I can't wait," she moaned, and began stroking her own cock faster. "Oh Sunset, having you inside me while I jerk this cock is just unbelievable." Within what seemed like moments, she was grinding her hips against Sunset's buried meat while her own jerked. Sunset saw her balls clench, and braced herself, then the first splash of cum rocketed directly on to her left breast, leaving a wet streak. The second glazed her right, then the third landed between them. While they weren't as big as the blasts she'd landed on Fluttershy, the magic clearly worked to increase human cum production as well, and Twilight kept jerking, each spurt causing her to press down and twitch delightfully on Sunset's own cock.

After a handful of spurts, Sunset's chest was coated, a sensation she found surprisingly erotic, and Twilight had gathered enough of her wits to send a few ropes into a beaker instead of on Sunset's orange flesh. After she had her sample, though, she let the rest splatter all over Sunset's eager body, to the delight of both. Just as her dick faded with a final volley, Sunset felt her flare beginning to deploy.

Twilight clearly did too, letting out a moan. "Quick," she said, pulling Sunset's arm, "get on top of me so it can go all the way in."

Without leaving her lover's body, Sunset sat up and Twilight wrapped her legs around her, allowing her to lay back. As Sunset loomed over Twilight, Twilight's own cum dripped down off of Sunset's chest on to her small breasts and (for now) flat stomach. Both girls shuddered in delight.

Sunset got a few deep thrusts in as her flare stiffened, bringing Twilight to the verge of a vaginal orgasm to follow up on her recent phallic one. With a final thrust she buried herself all the way in, ponderous balls pressing down on Twilight, who wrapped her legs around Sunset, holding her in to the hilt as both plunged into orgasm.

Sunset could tell the sheer volume of cum was unprecedented. Each rope was so large, and they were so frequent, that they barely felt separate, almost a continuous flow of seed into the tiny girl writhing in pleasure beneath her. After the third, every time Sunset's cock twitched Twilight squeaked as cum flooded into her womb. Both girls watched in awe and filthy pleasure as her belly swelled with Sunset's supernatural load. Soon the tiny girl looked near ready to give birth, and still Sunset's balls hung heavy.

"Sunset," she moaned, "pull out, I'm too full."

Sunset obeyed, her horse cock withdrawing from Twilight with a flood of warm cum, drenching the bed. It only got worse, as the waves of semen continued. The first splattered on Twilight's swollen belly, painting the lavender skin white. The depraved sight only made Sunset cum harder, and the next spurts drenched her heaving chest and rock-hard nipples, before the next soaked her lips and cheeks. With a moan Twilight licked off all she could, and the sight made Sunset pant with arousal, blasting the remainder of her load all over Twilight's hair. Finally, having filled her friend's womb to the brim and covered her in sticky semen, the magical organ vanished. Both girls promptly fell over, not caring about the sticky bed in their exhaustion.

After a long while, Twilight sat up, semen dripping off her entire front and out of her stuffed pussy. "Well," she said, "I think we learned a lot. It's only a pity I couldn't take it all, now we won't know how much bigger the load really was."

"Twilight," Sunset sighed, "I think we've proven it's significantly bigger."

Twilight frowned, but finally nodded. "I suppose it'll have to do."

In Which Sunset's Water Bottle is Found, Along With her Secret

Ever since Sunset had shared the news about her potion with the rest of the Rainbooms, Pinkie Pie's mind had been working above and beyond even her usual frenzied speed. Normally she wasn't someone prone to thinking long-term, except in specific party-related circumstances. But now she realized a whole new group of her fellow students was opening up to her. Literally, she hoped.

It was an open secret Pinkie was well-acquainted with the men of Canterlot High. Her iron-clad dedication to keeping secrets and her desire to be close to everyone proved a powerful combination. The straight population of the school even had an (always whispered) saying: "what happens in Pinkie, stays in Pinkie." While she'd of course never encourage or even allow anyone to cheat, couples broke up all the time, and the sad former boyfriends definitely needed comforting. If the couples got back together later, well, great! She was mostly interested in eating the cake, someone else could have it.

Later, she even found that girls were learning the "Pinkie rule". She'd gotten more than one text from a girl going out of town on vacation asking her to take care of the boyfriend's needs. Who was she to argue with her friends? All in all, by now, Pinkie had been intimate with nearly every dude at the school, which she considered a point of pride, though of course she'd never brag about it and breach their trust.

To her sadness, though, Pinkie happened to be straight. She'd certainly tried! She really wanted to share the delicious gift of orgasms with the girls, too, but she just couldn't get enthusiastic about pussies. And if she wasn't enthusiastic, she couldn't provide service up to her standards. Now, though, a new option had appeared! She wasn't sure how she'd feel about being the one doing the dicking, though she was eager to find out. But she was sure she'd enjoy taking another girl's magical cock. She'd never had any trouble finding her fellow ladies beautiful, or their bodies nice to look at. She just really liked dick. Pussy, mouth, or ass, taking her lover inside her appealed to Pinkie's hostess nature. The phrase wasn't just "what happens in Pinkie" because it was clever.

Now, the possibility of being able to have done the entire student body's....bodies by the end of senior year seemed like a real one, and Pinkie was eager to get to work on it. But she needed to ask Sunset's permission first, and she hadn't had a chance yet. And then she'd need to get in touch with Other Twilight. She knew Sunset had a fair number of potions, but they wouldn't be nearly enough for Pinkie's needs.

For now, though, as the school day was ending, she had a more pressing concern: thinking about this for the two days or so since Sunset had spilled her secret had left her aroused nearly to distraction. She wanted to jump Sunset herself, but the other girl hadn't responded to her text about meeting up after school. It wasn't surprising; the school required phones to be on silent, and Sunset still hadn't learned the knack of always checking hers. Still, it was a disappointment.

Instead, she had to fall back on her emergency vibrator, hidden in her gym locker. She'd always rather have a real person, of course, but all of her usual suspects were busy with after school activities today. After spending all day wondering what kind of dick each of the girls she saw would get, and how they'd prefer to put it into her, she didn't want to wait until the evening.

Of course, Pinkie being Pinkie, it still took her a while to get to the locker room after the last bell. Half the rooms on her way had some club or other meeting in them, and she just had to go in and say hi. After all, even if sex was one of her very favorite parts of being friends, it wasn't anywhere near the only one. Or even the most important.

So by the time she finally made it to the locker room, nearly an hour had passed. The girls track team were on a short practice - they'd just had a meet, and the coaches were giving them time to recover. Pinkie was worried she'd have to wait for them to finish to get the privacy she wanted, but she walked by them leaving on her way, including obligatory hi-five to Rainbow Dash, so she thought she'd be safe until the other teams finished up, which would be another hour.

When she moved in among the lockers, though, she found Muffins still there. Though she was disappointed not to be alone, she couldn't be too upset. The grey-skinned girl was a friend of hers, after all. Okay, everyone was, but Pinkie liked Muffins a lot. She wasn't the best student, sure, and she was a bit clumsy. Pinkie knew she'd been teased for both in the past. But she wasn't stupid, she got things eventually, and she was just so open and guileless. Kind of like Fluttershy, but without the, well, shy.

Muffins was also on the track team, and clearly struggling after practice. It was clear from the sweat on her body that hadn't even hit the showers yet, and Pinkie, having spent all day thinking about her fellow girls, couldn't help but be reminded of just how hot the other girl was, and her state of near-undress - bra and panties only - wasn't helping. Though she wore baggy clothes that didn't make it obvious day-to-day, Muffins had a killer ass, as big as Pinkie's generous one, but firmer from her athletics. Pinkie thought it might be her favorite at school, though she did like big butts, if she wasn't going to lie. Her simple cotton panties showed it off to great effect. Her breasts were similarly generous, again of a size with Pinkie's D-cups, but less prone to jiggle. While Pinkie thought her own jiggling was pleasingly festive, she admitted there was a joy to big, firm breasts like this as well.

Right now, Muffins' breasts were jiggling a bit, though, as she struggled to get her bra off. It had a rear clasp, and she seemed to be having some trouble working it.

"Darn it, I just don't know what's wrong," she muttered, then saw Pinkie. "Oh, hi Pinkie! Mind giving me a hand? New bra, I didn't notice it had one of those dumb back clasps."

"Sure!" Pinkie moved towards her. "Why didn't your teammates help, though? Are they being mean to you? Do I need to yell at Rainbow?"

"Oh no," Muffins said, "they're wonderful. I just took longer to get back, I forgot we were on short practice and took the longer loop partway before I remembered."

"Oh, that makes sense," Pinkie popped the clasp, freeing the grey orbs with a pleasing bounce. "I hate those too, they're hard when you're as big as us! I usually just turn the bra around."

"Oh," Muffins said, "that's really smart! Thanks Pinkie!" She lifted her water bottle and uncapped it. Pinkie saw it was a distinctive bottle.

"Wait," she said, "that's--"

But it was too late. Muffins opened the bottle and downed the whole thing in one long chug.

"...Sunset's water bottle," Pinkie finished, suddenly flushing darker pink at the thought of what seemed about to happen.

"Oh, that's where it came from! I bumped into her yesterday," Muffins giggled. "I have a lot of these, I thought it was just one I'd forgotten about. But who cares, it's just water, right?" Before Pinkie could answer, Muffins' eyes rolled and her grey face darkened. "Whoa. Did she spike this or something?" Muffins giggled again.

With a loud tearing, her panties gave in at the sudden pressure, and, as Pinkie'd suspected, new equipment burst forth. Whatever genes gave Muffins her generous chest appeared to have also carried on to her magical endowment. Her rod was a thick as any Pinkie had ever seen, and might have been slightly longer. She gaped, jaw slack.

Muffins reached down and touched her new cock in wonder, letting out a disconcertingly but adorably feminine eep at the contact. "Um, what did she spike it with?" She looked up at Pinkie expectantly. Pinkie bit her lip.

hey u busy after class? hmu

Sunset had a suspicion about why Pinkie wanted to be "hit up" after class. Though she'd certainly gotten a workout over the last few days, she wasn't opposed to the idea of getting her hot loaf in Pinkie's oven, so to speak. But she'd missed the text until after she'd already spent nearly an hour playing cards in the library with the gaming group. Now she wasn't sure if Pinkie was still interested, or if her legendarily short attention span had caused her to look elsewhere.

Well, there was only one way to find out. While Twilight originally wrote the app that let them locate each others' phones for emergencies, no one had ever minded using it casually before. It wasn't like any of them cared to maintain that kind of privacy. So she loaded it up and brought up Pinkie's location. She figured if she was still at school, she might still be interested.

She was mildly curious when the location popped up as the girls' locker room, since she'd never known Pinkie to do sports. But she was still at school. Sunset shot a text back, but figured she might as well head in that direction anyway. Bidding farewell to the gaming club, she headed out, keeping the app open to make sure she was still heading for Pinkie.

As she walked, she couldn't help her mind wandering. She'd seen Pinkie naked, of course. She was pretty sure the whole school had at this point. The party girl was always down for strip poker, strip spin-the-bottle, or just stripping. While some of their shyer friends had never been into it, Sunset until recently hadn't seen the big deal, given her Equestrian upbringing. While she also hadn't seen the appeal, she'd always been willing to be a good sport and participate.

So now she had rich grounds for fantasy. The differences between Pinkie and her other friends made her seem pleasingly novel as a partner. Her breasts were even larger than Rarity's, and Sunset imagined them jiggling as she pounded her. Her ass, too, was plump, and would certainly show each impact as Sunset thrust. But somehow despite her sweets Pinkie was hardly fat. Though she was by no means petite like Fluttershy, or bordering on underfed like Twilight, it was more that she was just bigger, and Sunset was sure that her stomach would bulge like the others if she took a few full loads. Though she knew Pinkie was on pretty much the best birth control one could get, she still found the idea of it enticing. With her full breasts and wide hips, she'd look heavily pregnant.

She was surprised her dick hadn't already emerged once she reached the locker room. She supposed Twilight must be right - the magic relied on physical proximity to her similarly magic-touched friends. In that case, she thought with a smirk, I hope Pinkie wants what I think she does, because I'm going to grow it as soon as I see her.

She was right, but not exactly in the way she expected. Pinkie was in the locker room, but so was Muffins. Both lay on a bench, Pinkie on top of the grey girl, both completely naked. And Pinkie was enthusiastically riding Muffins' massive cock.

"Pinkie! What happened?"

Pinkie turned to her with a grin. "Oh -- mmmph - hey Sunset," Pinkie pointed to the floor, and Sunset saw a familiar water bottle there. "I found your water bottle. Oooooooh. Muffins had it."

Now awash in familiar lust and aware of the pony prick tenting the front of her skirt, Sunset walked around to the front of the pair, hoping talking to Pinkie's face would be better than watching Muffins' huge shaft plunge in and out of her.

Muffins lay on the bench apparently nearly insensate. Her eyes were rolled back and her tongue hung out, and she panted as Pinkie fucked her in a steady rhythm. Both pairs of generous breasts bounced in harmony, the grey ones oscillating whole in a way that made Sunset long to play with them, and the pink jiggling such that there could be no doubt of the enthusiasm with which their owner was moving her hips against the cock deep inside her. So, overall, moving hadn't helped.

"I uh, got your text," Sunset said.

"Oh - mmm - yes! I wanted you to fuck me, but thing - aaaah - happened. I'll tell you about it later," she looked down at Sunset's obvious bulge. "It's - oooh - okay though," she reached out and grabbed Sunset's ass, pulling her close, then pulled down her panties, freeing her firm horse cock. "I'll take care of you too!" She opened her mouth and pressed her lips to Sunset's tip, running her tongue across the flared head and over the large opening.

"Wow," she giggled, pulling back, "it really is a pony cock."

Beneath her, this seemed to rouse Muffins, who giggled breathily. "It is! It's so cute!"

As Pinkie pressed her lips back to Sunset's meat, Muffins reached up and grasped it lightly, running her hands over the leathery, veined base. Sunset groaned. Pinkie looked up at her, and she'd never known eyes alone could look so wanton. She somehow stiffened even further. Pinkie twirled her tongue on the bottom of Sunset's shaft, then plunged her head down, going well past the medial ring, her lips pushing Muffins' hand all the way to the base of Sunset's shaft. Sunset's jaw dropped, but she was too aroused and surprised to even make a noise. Pinkie's warm, wet mouth and throat surrounded her, and Muffins moved her hand as much as possible, nudging her heavy balls with each tiny stroke.

Too much was going on to even let Sunset think, so she just turned all her attention to the wonderful sensations of two girls lavishing attention on her pony prick. Even there, the variety of sensations was nearly overwhelming. Pinkie's tongue, lips, cheeks, and throat all felt subtly different. Muffins' hand was dry and leathery, but still moved easily over her sweat- and spit-drenched shaft. Then, just when she thought it was all too much already, Muffins ran her tongue slowly and curiously along the bottom of Sunset's laden sack.

"!" She couldn't manage a word or even really a moan, but desperately wanted to warn Pinkie as she felt her flare begin to harden. Muffins took one of her massive balls into her mouth with a squeak, then two sets of vibrations filled her eager cock. Pinkie let out a long, shivering, full-body moan, and Muffins a tiny, adorable series of them. Out of the corner of her eye, Sunset saw Pinkie wrap her legs around the bench and Muffins and press down, while she saw Muffins' legs and hips straining to press her deeper into Pinkie. She realized that even now, her friend and fellatior was being inseminated.

It was too much. "P-Pinke!" was the best she could manage as she felt her flare go full hard and the first big rope of cum surging up her cock. Pinkie pulled back, but not all the way, and Sunset saw the flare puff out her cheeks. The first blast rushed into Pinkie's throat, and another moan caressed Sunset's shaft as Pinkie's whole body shook with her prolonged orgasm. Muffins kept pumping Sunset's shaft, too dazed by her own orgasm to stop, and it felt like each pull urged another rope of cum into Pinkie's waiting mouth.

In the tiny part of her mind still capable of knowing things, Sunset knew her magically massive load would be too much for Pinkie to swallow. She expected her friend to pull back, letting the last ropes splatter on her ample breasts and on Muffins's, dripping down on to the other girl's belly and face. She even thought coating both in her cum would be hot. She also knew that the position she was in with Muffins had never worked before - the volume of cum became too great, but gravity stopped it from going past the cervix, so the girl with the dick always had to pull out, or flip positions to let gravity draw the seed all the way into the womb.

Somehow, though, Pinkie continued to ignore physics and biology. She just kept swallowing, and just kept pressing Muffins to the bench. Instead, Sunset felt her mind return, at least in part, and her orgasm end. Only then did Pinkie pull back from her slightly drooping cock, lick her lips, and sigh. Not a single bit of sperm left her mouth.

"Horse cum tastes different," she said, contemplatively. "Not bad, though. Good different. Thanks, Sunset!" Before Sunset could reply, Pinkie's eyes widened. She looked at Sunset's cock, then down at Muffins.

"Hey, you two are both still ready to go! Mind if I stay right where I am, Muffins?"

"Only if you mind me cumming in you again, Pinkie."

"Oh good!" She turned to Sunset with a slight frown. "Sorry Sunny, I don't think I have room to drink any more."

Sunset laughed. "I didn't think you could take the whole first load! It's okay, watching you two go at it is super hot. If Muffins just leaves her hand there, and you don't mind my getting you two dirty, I'll be just fine." She moaned as Muffins pumped said hand again.

"Don't be silly, silly!" Pinkie said, all smiles again. From Celestia-knew-where - she wasn't even wearing anything! - Pinkie produced a bottle of lube. "My butt's nice and spread in this position, and I haven't had a nice cock in my ass in ages! Or a nice pony cock ever! If I'm gonna get so full of cum, I want it everywhere!"

Sunset grinned, and needed no further encouragement. As Pinkie began moving her hips on Muffins again, Sunset moved around to their rears. As Pinkie'd said, her wide, plump cheeks were spread wide, revealing a pucker as pink as the rest of her. She moved only a little on the cock still buried deep in her pussy, making sure long strokes didn't close her cheeks before Sunset could get all the way inside.

Well, Sunset thought with a shrug, first time for everything. Though she would gladly have filled Pinkie's womb, she didn't begrudge Muffins the chance. It was the other girl's first time having a cock, after all. Besides, she suspected she'd have plenty of chances. She imagined one of Pinkie's trademark "Truth or Dare" games, imagined stuffing her pussy while their friends looked on in fascination, and she was rock hard again. She poured a generous helping of the lube between Pinkie's cheeks, and enjoyed the gasp as she rubbed it in, making sure she'd slip comfortably into her friend's bowels. She pressed in in one long stroke, enjoying how tightly Pinkie's sphincter grasped her, but just in one place. It felt very different from her mouth, or from a pussy.

Pinkie moaned, then giggled. "Your cum's going to meet itself right in the middle, Sunny!" She thought for a bit, "probably right near where Muffins' is!" She moved a hand down to her belly. "This Pie is gonna have plenty of filling!"

Sunset looked where her hand was. Indeed, somehow she must have overcome gravity and gotten Muffins' sperm into her womb, because her belly was already notably distended. Where the girl's generous breasts had previously held them apart, Pinkie's swollen belly now nearly touched Muffins' flat one. Sunset grunted at the sight and began thrusting hard.

"Oh yeah, Sunny, that's the spirit," Pinkie said.

"I miss your balls up here, though," Muffins said, "they gave me something to do with my tongue."

"Oh, silly, I can fix that!" Pinkie put a hand behind Muffins' head and pulled the other girl up until their lips met. They were now pressed together from lips to hips, breasts, bellies, and groins all pressed tight.

And Sunset rode on top of them. She thought their closeness was adorable, so took it on herself to provide motion to the system. She pressed them closer together with her weight, preventing Pinkie from bucking her own hips off of Muffins' massive shaft, then began pumping herself. She could feel the other cock through Pinkie's internal walls, and she knew every time she gave a hard thrust, it was echoed below her. Every time she finished one, Pinkie's full ass moved, and the sight alone brought Sunset a little closer.

Beneath her, both girls were drenched in sweat and making out like new lovers, which she supposed they were. Sunset felt herself getting close. She reached between her own legs and found Muffins' balls and caressed them lightly, returning the favor. Then, remembering an unusual aspect of the magic, she reached lower, and dipped two fingers into Muffins' intact if relocated pussy. She was rewarded with a deep moan, and a hefty spurt of lubrication, which she pulled up and traced across Muffins' heavy balls.

That was too much for the new girl. Sunset felt the balls she was teasing clench, and her flare deployed in sympathy. She felt the pulse of cum surging out of Muffins and into Pinkie's reproductive system, and then let out a moan as she shot her own mirrored blast into her bowels. She nearly screamed with pleasure, and clapped her hand over her mouth to stop it. Even muffled on each others' mouths, the two girls below her seemed to be having equal difficulties staying quiet.

It felt like forever that Sunset was buried in Pinkie's rich ass, flooding her body with the entire contents of her magical balls, and feeling Muffins' own seed pulsing in below her. Finally, though, her cock disappeared, and she let herself slide to the floor. A steady trickle of thick cum dribbled from Pinkie's ass as she left, mingling with a similar trickle of slightly thinner human seed dripping from her now empty pussy over Muffin's neat box.

Pinkie too flipped off of her blonde lover with a sigh, and sat, back to the lockers, hand on her bloated belly. A small puddle of seed began forming under her.

"Wow," Muffins breathed, pressing her own hand to Pinkie's belly. "It really looks like I knocked you up." Her eyes widened. "Wait, did I?"

Pinkie laughed. "I'm on like all the birth control, silly. And Sunset's potions have some in them too."

"Oh," she said. "Whew. How does it feel."

"Neat. And kind of hot," Pinkie blushed. "Though wowee, I don't think I'll want sex again for at least, I dunno, three or four hours!"

Muffins blushed. It was utterly adorable. "I'm a little jealous. I wish I knew what that felt like." She ran her hand wistfully over Pinkie's belly again. "And I dunno if it's the magic, but now that I've just got my girly bits back, they're still all wet."

Pinkie giggled, then looked sidelong at Sunset, who shrugged at her. She'd found she had the same experience as Muffins, after all - once her magical cock disappeared, there was nothing left to be tired.

"I bet you could convince Sunset to help you out," Pinkie said.

"Wait, how?"

"Well, when she gets turned on, she sometimes gets a dick without using a potion at all. That's why she got one when she came in and found us like that."

"Oh," Muffins said, then "oh!" She sat up, large breasts bouncing in a way Sunset, as the owner of less large, slightly less firm, breasts, found both compelling and deeply unfair.

"Sunset," she said, moving to squat in front of her. The squat, whether intentionally or not, spread her legs wide, leaving no need for Sunset to imagine what lay beneath her trimmed blonde bush. She leaned in and kissed Sunset, pressing their breasts and nipples together. Sunset squeaked. Then Muffins broke the kiss, and whispered in Sunset's ear.

"I've never been this horny, Sunset. I want you to fill me up like I filled up Pinkie. I'm ready right now. I don't want it slow. I want you to fuck me until you cum your dick away." When she said this last, she placed two fingers at the back of Sunset's already dripping pussy, and slowly dragged them across it. By the time they reached the clit, they were sliding over full balls and then along Sunset's fully erect and ready equine prick.

"All right," Sunset whispered back. She'd already been willing, and Muffins had done an excellent job of making her ready. She didn't intend to let her down. She wasn't sure she'd be able to pull this off, but she was willing to try, Muffins looked pretty light, and she wasn't really in her best frame of mind for decision making. So she began to stand, but made sure to do so in just the right way. As she rose and moved her hips up, her cock was ideally positioned between Muffins' spread legs. As she'd hoped, the tip found the other girl's opening, and her eager partner slid her hips slightly, and as she rose to stand, she took Muffins up with her in her arms, and buried herself in the other girl to the hilt.

"Oh wow," Muffins and Pinkie said simultaneously, the first at the sensation, the other at the sight. Sunset knew even through the haze of arousal that she couldn't completely support the other girl forever, but it was all part of the plan. She moved to the row of lockers, pressing Muffins' back up against them for support. Then, braced, with the other girl's legs wrapped around her, she did the only thing she could, and exactly what Muffins had asked her to: she fucked her hard.

Both girls had the same goal in mind: emptying Sunset's balls in Muffins' womb as quickly as possible. So Sunset through finesse and tempo out the window. She pounded her lover against the lockers relentlessly, trusting that Muffins would get off when she did, given how eager she was to feel full. As it turned out, she was wrong...Muffins came first, the relentless pounding too much for her. She locked her legs around Sunset, stopping her pounding short, but the orgasmic writhing of her passage was more than enough to make up for it.

"Oh Pinkie," Muffins moaned, "I feel her head sealing me up! This pony cock is great!"

Indeed Sunset's flare had deployed, and her orgasm washed over her. She felt like her ropes were larger than ever, each big blast eager to fill this busty girl's little belly up. It only took three this time until the pressure was building against her flare, and the fourth surged into Muffins' womb.

"Mmmm, that's so hot," the other girl murmured, then giggled. "Good thing your potion makes sure you don't knock me up."

Sunset almost giggled back, then her eyes widened. She tried to pull out, but her own clever setup stopped it - Muffins was locked to her, leg and arm.

"Don't be silly," Muffins said, "I'm about to cum again just from this, you don't need to thrust again."

"I didn't take a potion," Sunset gasped through her continuing orgasm, "I just let the dick appear! It might be fertile!"

"Oh!" Muffins' own eyes widened. Then her tongue lolled out, and Sunset felt her pussy clench again around her as, somehow, her lover began cumming again. "Oh well," she moaned, "too late now. And honestly, that's really hot. Keep impregnating me, Sunset Shimmer!"

Sunset knew she shouldn't. She also knew she shouldn't want to. But she was in the midst of a shattering orgasm, and her lover was begging for her seed while beginning another. And, deep in whatever primal part of her had wanted a cock to begin with, she wanted to knock this girl up. She wanted to see her belly stay big with their...baby? Foal? She didn't know what it would be, but that animal part of her didn't care. She wanted to see Muffins in the halls with her bulging belly and know it was her seed that had made her that way.

Sunset grunted and pulled Muffins close, and she felt her own orgasm redouble, the ropes of seed replaced with the continuous, pulsing stream that she knew meant she was going to empty every drop into the other girl. Seed that, she remembered, was so potent that, if the spell had indeed worn off, it might well bring Muffins into season just to impregnate her.

They jammed their lips together to muffle what would otherwise be their screams of pleasure as Sunset felt her lover's belly swelling against her own. She thought of the potency of what she might be pumping into the other girl, and she nearly fell over with the orgasmic convulsion. She thought she'd never cum this hard, ever.

Muffins broke the kiss and whispered again in her ear. "This is the best ever. I want all of your sperm, Sunset."

With a last mighty shot, she obliged, and her dick vanished, replaced with a surge of fluids down her leg. She slid to the floor, letting Muffins slide with her, and both sat heavily.

For a long while no one spoke.

"I don't really want to have a baby, you know," Muffins finally said sadly. "Not yet."

"I know," Sunset said. "I don't want you to either. We'll need to see the nurse."

Muffins nodded.

Finally Pinkie spoke up.

"I drank too much. I think I'm gonna be sick."

Sunset sighed.

"Let's get both of you to the nurse, then."

In Which Sunset is Unaware of Ominous Developments, And Takes a Class Trip

Sunset was pretty sure that even without her own baleful influence on Canterlot High, Ms. Redheart, the school nurse, would have seen some shit. As it was, she acted like someone who'd seen centuries of it. It was easy to forget she wasn't very old herself. She'd arrived during Sunset's own time at the school, immediately after finishing her degree. Sunset wasn't actually sure which of them was older, chronologically, though of course Ms. Redheart had no idea of Sunset's real age.

Now, she swiveled on her stool and turned to face the three girls standing (well, Pinkie was lying on the cot) before her.

"Muffins, I will never believe your 'magical centaur in the woods' story," she said. Muffins just blushed and self-consciously rubbed her still-swollen belly.

"Sunset, are you sure you don't have anything to add?" Sunset shook her head. "Pinkie?" Pinkie mimed zipping her lips. Redheart sighed.

"Well, all right. Muffins, whatever this is and wherever it came from, I can't imagine it can get you pregnant."

"You know that much about how different kinds of sperm look under a microscope?" Sunset wasn't an expert, of course, but it seemed like pretty esoteric knowledge.

"Not normally," Redheart shrugged, "I was going to try to look it up on the Internet. Well, that, and honestly your story's so weird, I half expected it to be milk or something. But, well, take a look." She stood and walked over to the medicine cabinet, in which she began rummaging. Sunlight replaced her on the stool and peered into the microscope's eyepiece. She'd seen photos of sperm in passing, and dimly remembered tadpole-looking things with the general translucency of cells under a microscope. The things revealed by the microscope had the same general head-and-tail setup, but the heads were heart-shaped and pinkish, while the tails were undulating, glowing rainbows. Sunset blushed.

"Wow," she said. "That sure is something."

"I don't know whether to call the F.B.I. and ask for Agent Mulder, or write one of you a glowing recommendation letter to a microbiology program. I'll probably compromise by trying to forget this whole thing." She pulled out two bottles of pills and stood. "Muffins, I can give you some Plan B if you want, that's the 'morning after pill', but it'll make you nauseous and if those things can get you pregnant, medical science has nothing to do with it anyway. But up to you." Muffins thought a bit, then shook her head. Redheart put the first bottle back down. "Okay, well, if you squat and spread your legs over the toilet, enough of that stuff should drain out that it won't be visible. You can do it here if you're afraid to go home like that." She walked over to Pinkie. "Pinkie, you know I respect your personal choices, but I thought you learned this one already. If you want to sleep with ten guys at once that's your business, but you can't swallow all their semen! There's such a thing as too much!"

"I know," Pinkie moaned, "but it was just one load this time! I thought it'd be okay. It was just...such a big load..."

Redheart sighed. "I suppose I won't get very far telling you that the human testes just cannot contain this much fluid?"

Pinkie said nothing.

Redheart sighed again. "All right. Well, I've got some medicine here that will settle your stomach. If you needed to vomit you'd have done so already, so you don't need to go to the hospital. But next time you see fit to fellate a," and here she actually made the air quotes, "'magical forest centaur', please don't swallow." Pinkie nodded. Redheart gave her a pill and a cup of water.

"Sunset," she said, "a word?"

Filled with dread, Sunset followed her from the sick room into the waiting room that housed the reception desk. Since it was after-hours, the receptionist had already gone home, and the privacy soundproofing kept Pinkie or Muffins from overhearing anything.

"Sunset," Redheart said, "I appreciate that you've turned over a new leaf, I really do. But the only things I've ever heard of that looked like those sperm, or whatever they were, involved you. Now please, I want to make sure I give these girls the best care I can. Is there anything you can tell me about this? I promise, my only concern is for the health of the students, I won't tell anyone. I suspect if you do know anything, no one would believe me anyway."

"Well," Sunset took a deep breath, and told her the whole story. It took some time.

"I know it doesn't sound much better than the forest centaur," Sunset finished, "but it's true." She remembered the contents of her backpack, and rummaged around for a bit before pulling out one of the blue-papered vials. "See? Here's one of the potions. You can look at the label. It's printed, but it's in Equestrian. I know it's not proof, but I don't really want to show you. It makes you really horny."

She handed over the bottle, and Redheart looked it over. She gave a low whistle.

"I would have believed you anyway," she said. "I hear what the students say, and you've really impressed everyone with your new attitude. I know you wouldn't lie to me about something important to health. But seeing an alien language on a magic potion...it's something else. Thank you for trusting me." She smiled, and moved to hand the potion back.

Sunset smiled and let out a deep breath, but didn't take it. "Thanks for understanding. You can have it if you want, since you think it's interesting. I've got plenty, and can always get more."

Redheart thought for a bit, then put it in her bag.

"Thanks. I can't imagine I'll want to use it, but you're right, it's fascinating." She cleared her throat and looked serious. "Now, as your nurse, I do have to remind you that even if you can't get anybody pregnant, you should still be careful of sexually transmitted infections. You should really use a condom."

Sunset blushed. "I ah, asked Twilight about that in a letter. Apparently all the potions have magic against that, too."

Redheart let out a whistle. "That's quite the feat. If you can ever figure out how to make these over here, you'd save lives. And make a fortune."

"I'll let Apple Bloom know," Sunset said. "The other Apple Bloom, that is. Anyway, are they going to be okay?"

"They should be fine," Redheart said. "Pinkie's seen worse. That girl just loves being accommodating. And Muffins was just worried. I'll make sure to take care of them. I'm sure they'll want to see you later, but maybe let them rest for now. I know you've been intimate, but sometimes people still would rather not be seen when they're not at their best."

Sunset nodded, and left.

Redheart sat down heavily on the receptionist's chair with a sigh. She needed a moment to collect herself. She took it, then headed back to the sick room to see if the two overstuffed girls needed anything else.

Unbeknownst to her or Sunset, Twilight Sparkle wasn't the only one to realize her security was, well, the security of a high school nurse. From her distant apartment, Adiago Dazzle had been watching and listening to the whole conversation. When Redheart returned to the sick room, she took off her headset and grinned.

"Aria," she called across the hall, "I've just made a wonderful discovery..."

"Sunset Shimmer!" Sunset thought she was done for the day, but Trixie's voice made her stop and sigh. Much though she was ready to just go home, she knew ignoring the bossy girl would not improve the situation. She turned.

"Yes, Trixie?" She didn't bother to keep the fatigue from her voice.

The hallway was dark, with only the emergency lights on. The visit to the nurse had gone so long, Sunset thought they must be the only ones left in the school. She could barely see more than Trixie's silhouette, though the other girl was less than twenty feet away and advancing.

"Trixie saw you pleasuring Pinkie and Muffins in the locker room," Trixie said, and Sunset's eyes widened. "Trixie is horny. You will service her as well."

Sunset nearly choked.

"What? No."

Trixie tossed aside her shirt. She was close enough to see better now. Her breasts were nice - moderately sized over a toned stomach. Still, Sunset felt no stirrings.

"How can you refuse the fit and sexy Trixie's glorious feminine charms? Especially for the inferior Pinkie Pie? Why, the whole school has enjoyed her! To lie with Trixie is a rare treat!"

"Yeah, pass," Sunset began to walk away.

"Do not walk away from the glorious and sensuous Trixie! Such an opportunity may never come again!"

"I hope I'll be so lucky," Sunset said, then shrugged, and stopped for just a moment. "Look Trixie, I know you won't listen to me now, but just in case you do someday: you look good. I'm sure someone would be happy to enjoy your 'glorious feminine charms'. But I'm having enough trouble with how horny this magic makes me. I don't want anyone who assumes I'm theirs for the taking. Ask someone else if they're interested, and they probably will be."

"Hah! You don't know what you're missing out on, Shimmer! You can't handle Trixie!"

Sunset sighed. "I'm sure," she said, and left.

Trixie yelled after her for a bit, then put her shirt back on with a flounce. Frustrated and desperately horny, she returned to the locker room. Trixie knew the janitors wouldn't be in until eight, and the whole place still smelled overwhelmingly of sex, with several pools of fragrant cum still puddled on the floor. It reminded Trixie of stealthily watching the whole thing from hiding, and she reached under her panties to her soaking pussy. She looked over at the lockers where she remembered Sunset pressing Muffins, plunging that thick animal cock into her willing body. She stroked herself harder and harder imagining it, then pulled of her panties entirely. Imagining Sunset's cock, she worked three fingers into herself and moved them in a frenzy, tweaking her clit with her thumb as she did so. Before long, she nearly fell over as her knees weakened in an intense orgasm.

As she gathered her thoughts, she found herself still staring at the lockers. Lockers...

Sunset will pay for turning Trixie down, she thought. The nerve!

Using practiced skills and her trusty set of assorted pins and screwdrivers, she forced the lock on Sunset's locker. She wasn't sure what she intended to do exactly - perhaps leave her bra or panties as a taunt. But when she pulled the door open, she saw the crate full of bottles, and stopped. She'd heard Sunset mention a potion. Maybe this was it? She picked up a blue labeled bottle, but everything on the label was incomprehensible. Was that a picture of a horse? She rummaged a bit more, and found more bottles, labeled in yellow, equally incomprehensible.

She began to put them back, but the blue label came off in her hand. For some reason it wasn't glued to the bottle, just fitted snugly around it. As a result, it was easy to remove.

Maybe one gives you the dick, and the other gives it to your partner, Trixie thought, grinning. Won't Sunset be surprised next time she wants to fuck some harlot, and ends up fucked herself? Quickly, she set about switching the labels. As an afterthought, she took one bottle of each for herself.

With all her recent distractions, Sunset nearly made a critical error. Luckily for her, she had friends, and electronics.

Not long after she arrived home, her phone beeped twice in quick succession.

The first was a calendar reminder: Pack for Biology Trip Tomorrow.

The second was a pair of snapchats from Rarity. The first was a selfie of her alabaster friend in a truly stunning black corset, panties, and garters, her full breasts proudly free above the dark cloth, nipples stiff. The caption read: Have a good trip, darling. The second was another selfie, this one showing her from behind, bent over her bed, in the same outfit. It left no doubt that the panties were open-crotch and that Rarity was dripping. The caption: You'll have some more biology work waiting when you get back.

She sent back that she'd be using the last potion she had on her just based on the photos, then did so.

After, she packed for the trip. Unlike her friends, Sunset had elected to take an ecology elective. Unfortunately, Canterlot's urbanization in this world meant there weren't any good places to do a real ecological study nearby - even the woods the cross country team ran in weren't large enough to have any chance of finding signs of any large animals. So they were taking a few days off class to go out to the mountains to do field work in what could pass for real wilderness. It was only a few days, but still, she was sad to be leaving when she'd just discovered her sexual preference - and how many of her friends were enthusiastic about it.

In deference to that, she made sure to drop by the locker room before the bus left the next day. She wasn't sure what kind of privacy she might or might not have, but she expected to miss her friends, and that she might want to think of them fondly if she got any. It couldn't hurt to be prepared.

To her surprise, Rainbow Dash was waiting when she got there. At first she thought she might be hoping for a quickie, but not even Dash could be that fast - for those staying, the first period bell was about to ring.

"Uh, hey," Dash said, scratching the back of her head, "I uh, was kinda curious what it felt like. You know, having one. Can I have a few of those potions before you go?"

Sunset shrugged. "Sure." She handed Dash a few more bottles as she stocked her own bag. Then the bell rang, and both girls rushed off. Neither knew the blue-labeled bottles had once been labeled in yellow.

Sunset wasn't really close with any of the other students on the ecology trip. She'd taken it out of genuine interest. Equestria had almost no equivalent concept of ecological science: all of the environments there were either completely controlled by ponies, or dangerously and magically unstable. She had an idle fantasy that, if she were ever willing and able to return to Equestria, ecological science might help solve the mysteries of the Everfree. And even if not, it was nice to take a class that wasn't basically review from her time at the School for Gifted Unicorns.

Unfortunately, deserved or not, ecology had a reputation as being easier or softer than the other senior science electives, so most of the rest of the class were underachievers. Of the other motivated students, they were mostly those focused on social sciences, or hippies like Tree Hugger who mostly wanted to learn about pollution and environmentalism.

Initially, Sunset would have assumed Sonata Dusk fell in the "underachiever" category. They were far enough into the semester, though, that she knew the other girl did surprisingly well in the class, given her reputation. It was also the only class she didn't share with the other former sirens, though Sunset had never figured out how to ask exactly why that was.

Indeed, while Sonata was friendly to her in the class, the other two Dazzlings remained cold, and this cold shoulder prevented Sunset from being confident enough in the possibility of reconciliation to ask Sonata about it. But she showed up for the trip like everyone else, though she didn't look happy about it.

The bus ride took several hours, and there wasn't much on the docket for the first day other than settling in. By the time they'd finished unpacking their things and getting the tour, it was dinner time.

They were staying at an old summer camp, with all that entailed. The lodgings were bunk beds in two communal cabins, one for the boys, one for the girls. Groups from other schools stayed in the rest. In deference both to the age of the students and the comfort of the teachers, the staff were staying in the main house with the dining room, but in-cabin at sundown and lights out at 10pm would be strictly enforced by venue staff.

There was significant grumbling about it, but Sunset didn't mind. The cabins had their own bathrooms and showers, which meant she could find privacy if she wanted it. Other than that, she was just glad to have some time free of other homework. Her enthusiasm dimmed a little when she discovered there was no cell phone service or Internet, but she took heart in the fact that she'd thought to download Rarity's pictures from the night before.

After dinner, they were allowed to go to the lake until sundown. Sunset enjoyed swimming around, but avoided checking out the other students in their swimsuits too much. Though she suspected the presence of her fellow Rainbooms was required to provoke her spontaneous cock, it seemed better safe than sorry.

When they returned to the cabin at sundown, she discovered several of her fellow girls had been more excited about the prospect. Flitter and Cloudchaser were both drooling over the boys from Crystal Prep, and they collaborated with Tree Hugger, who wanted to see her boyfriend in the boys' cabin, on an elaborate escape plan. Sunset just rolled her eyes and got ready for bed.

Their mission seemed to go well. The three crept out the door not long after lights out, and didn't seem to get caught. To everyone's complete lack of surprise, Lyra slipped out of her own bunk and joined Bon Bon not long after. Then everything was quiet, and soon the rhythmic breathing of sleep filled the cabin.

Sunset was still wide awake. A night owl on her own time, she was also distracted by the thought of Rarity's photos sitting on her phone. Mostly out of paranoia, she wanted to wait until she was sure everyone else was asleep before going to the bathroom to take care of herself, though. Just as she thought everything sounded peaceful, and was getting ready to move, a voice whispered her name in her ear, from the floor.

Her eyes shot open and she turned her head. It had been dark enough that her eyes had adjusted well enough to make out Sonata's pretty face right in front of her.

"Wha..." Sunset spoke as quietly as she possibly could.

"Something's wrong," Sonata whispered back, equally quiet. "I need to talk to you. Can you move over?"

Sunset wasn't entirely enthusiastic about sharing a bed with Sonata, but it was impossible to mistake the worry in the other girl's voice, and she'd never been a good liar even with evil magic helping her. And given the context of the cabin, there didn't seem to be a better option. She slid over towards the window, and gestured Sonata up.

The bed was tiny, and Sonata slid in close in the interests of being quiet. They weren't quite touching, but as they faced each other, their lips nearly did.

"Um, it's about the other sirens," Sonata said. Sunset nodded.

"So, well, you know we never got on great, even in the old days. We all had to be mean, then, to eat, but they liked it more. Aria even liked being mean to me, and Adagio never stopped her. When we didn't have to be mean anymore, I thought they'd get better, like I hear you did. But they never really did."

Sunset wasn't sure why this was coming up now, but it was clear Sonata was distressed. "You don't need to care what they do, you know. You don't have to be with them any more."

"I know," Sonata whispered back, "but we've been together so long. They're the only creatures I've ever been close to. I can't leave them now."

Sunset wasn't sure what to say. She wanted to help Sonata, but it seemed unlikely she'd be able to get through centuries of codependency in a whispered conversation in a camp bunk. Instead she took Sonata's hand in what she hoped was a comforting fashion, hoping to encourage her to explain why the matter had come to a head now.

"It seemed like they weren't doing any harm, either," she went on, "so I figured maybe they'd get better. But yesterday, I overheard Adagio talking about some new information. Something about you. She stopped talking as soon as I came up the stairs. I asked her if I'd just heard your name, but she said not to worry about it."

"That doesn't sound great," Sunset agreed. "Do you know anything else?"

"No," Sonata said, "but the only reason she'd hide it from me is if she wanted to hide it from you. And they're not into surprise parties."

Sunset sighed. "You're right. Thanks, Sonata. I wish we had cell service her so I could warn my friends. But thanks for letting me know." She gave Sonata's hand an encouraging squeeze. She went to let go, expecting the other girl to leave, but Sonata gripped her hand back, gently but firmly.

"It's okay," she whispered. "I like you better than them anyway. But...I'm scared. If they find out, they'll hurt me."

"We won't let them," Sunset said. "That's not how friends should treat each other."

"I don't think anyone told them that."

"We will, if we have to." Sunset gripped her hand back, firmly.

Sonata pressed forward, lowering her head and snuggling it into Sunset's bosom. "Thanks," she said, voice quavering. She trembled slightly.

"Sonata...have they hurt you before?" Sunset dreaded the answer, but she had to know.

"Not since we lost our powers."

"So not since it's stopped being easy?" Sunset couldn't keep a bit of anger out of her voice. Sonata just nodded.

"I'll make sure it's never easy again."

Sonata just shook a little, and buried her head closer.

Sunset had no interest in dislodging the clearly miserable creature, but at the same time she was aware that nothing but a thin shirt separated Sonata's face from her breasts. Still, she wrapped her hands slightly awkwardly around the siren and patted her, she hoped comfortingly.

Sonata gradually pressed closer, until Sunset had her in a full embrace. She couldn't help but be aware of Sonata's body pressed against her. The siren's firm breasts pressed against her own, and her body heat was delicious in the slightly cold night. Sunset rested her chin on the other girl's head and tried not to think about it, with mixed success.

She nearly cried out in surprise when Sonata's hand ran gently across her panty-clad rear.

"Sonata, what...?"

Sonata looked up at her, magenta eyes wide.

"What's wrong?"

"Why did you touch me like that?"

"You wanted me to."

"What? I didn't say that."

"Oh, sorry," she withdrew her hand. "I...we still have a tiny bit of magic, you know." Sunset couldn't help but tense up. "Not like that! Only senses. But I can still hear it when someone wants me. I guess we were just talking so softly, I thought you'd said it out loud. Sorry."

"It's okay," Sunset said. There was a long pause.

"I touched you like that because I think you're hot, too," Sonata finally said. "Can I do it again?"

"It's...complicated," Sunset said. "I like girls, but I don't like having sex as a girl. I have a potion from Equestria I use. It gives me a penis. If you're into girls, I don't think we're really compatible."

"I'm a siren," Sonata said. "I don't really care about gender." Slowly she moved her hand down Sunset's back, giving her plenty of time to say no.

Sunset felt on some level like she should. Sonata was her former enemy. She admitted she still had a little magic. She was vulnerable, hurt. Maybe she didn't know what she wanted.

Sonata's hand reached Sunset's ass, and slipped beneath her panties.

Okay, she knew what she wanted.

Sunset said nothing. To her surprise, her own hand seemed to have moved down Sonata's back, and was now resting on the other girl's ass. She wasn't wearing panties in the first place.

Sonata stroked Sunset's rump gently, sending shivers up her spine at the light touch, then gripped one cheek firmly. Sonata shivered, and suppressed a giggle.

"Oh wow," she murmured. Before Sunset could ask what she meant, she moved both hands up and began lifting off Sunset's shirt.

Sunset realized it was the point of no return, at least for some kind of fooling around. Some part of her still wanted to tell Sonata to stop.

Instead, she reached her own hands down, and began pulling up the siren's own shirt.

Two garments fell soundlessly to the wooden floor. Two pairs of firm breasts fell free, warm flesh rubbing deliciously on warm flesh, hard nipples caressing each other. Sunset reached her hand down to touch Sonata's rear again. It was full and muscular, firm to the touch but soft and smooth. As her hand trailed to the bottom, Sonata spread her legs slightly, and Sunset cupped her hand between them, feeling the tips of her nether lips and a slight moisture. Sonata parted her lips and took a quick breath. Her own hand stole down and pressed between Sunset's panties and her thigh, pushing them down. Sunset pressed her rear back and folded her legs up, letting Sonata pull them off.

As she did, Sunset's pony cock sprang forth, firm and ready.

"Wow," Sonata breathed. "I thought you needed a potion."

"I did too," Sunset said.

"It's like one back home," Sonata breathed as she gently stroked it, making Sunset's vision swim with pleasure.

"Yeah, the potion knows I'm Equestrian, so it gives me an Equestrian dick."

"I love it," Sonata breathed. She traced her fingers up and down along the shaft, making Sunset shiver.

Sunset brought her other hand around and pressed it to Sonata's breast, lightly squeezing the satisfyingly yielding flesh. She traced the base and sides, running her fingers across the bones, then brought a pant to Sonata by circling in along the surface, closer and closer to the nipple, before finally touching it softly.

In reply, Sonata lowered her head further, taking one of Sunset's nipples into her mouth. She ran her tongue along and around it, then gently took it in her teeth. As she did, she pressed her rear back, spreading her legs further. Sunset ran her hand gently over Sonata's mound (lightly furred), and along her thighs, until Sonata spread her legs even wider, and pressed her clit against Sunset's teasing hand.

From across the room, a bunk creaked. They froze, reminded of the girls sleeping all around them.

"Mmmmmbest....friends..." Lyra muttered in her sleep.

After a moment, Sonata began working her lips on Sunset's nipple again. Her hand still stroked Sunset's cock, and she ran it gently from the brimming balls all the way to the tip. Then she reached down and grasped it, pulling it forward as she began moving her own legs forward. Sunset managed to pull herself together.

"I should take a potion, just to be safe," she whispered. "They have some extra magic. Outside pocket of my bag." She didn't really think Sonata had any diseases, but she was a siren. One never knew.

Sonata reached down off the side of the bunk and produced a potion. Sunset chugged it eagerly. The warmth flowed through her, but it felt different somehow. Poised, or anticipatory, even more than usual. She shrugged it off as an effect of the foreplay.

"Are you sure?" Sunset asked, taking advantage of her momentary self-control.

Sonata just looked puzzled. "Of course. Why wouldn't I be?"

"I dunno," Sunset flailed. "It's just...we haven't ever really been close. My friends and I cost you your special magic gem..."

"You said you'd help me," Sonata said. "No one ever said that. It's nice. And I don't mind losing the gem. Sure, we were powerful, but the others like that. I like just being me. And," she pressed her legs forward, her pussy lips stroking Sunset's cock-head, "I will really like being me with you inside me."

"I don't know how I'll stay quiet," Sunset murmured, already nearly moaning from the feeling of Sonata's wet opening on her cock.

"I have an idea," Sonata said, and kissed her.

Sunset was so surprised by the kiss, it took her a moment to process that Sonata had started pushing her hips down, sinking Sunset's pony cock into her azure pussy. She decided to kiss back, and thrust her hips back, and soon the two were locked together, Sunset hilted in Sonata's snug sex.

Slowly, carefully, Sunset turned, lifting herself and pushing Sonata down until the latter lay underneath her on the bunk. She managed to avoid a significant creak. Paranoid, the two stopped dead for a moment, Sunset still fully sheathed in Sonata, straining to hear if anyone had been disturbed.

No sound came from the surrounding bunks. Slowly, carefully, Sunset began plunging in and out of Sonata, lips still locked together to muffle moans. She pressed her chest tightly to Sonata's, relishing the contact of their breasts.

Steadily she fucked, slowly pulling nearly out of her lover before plunging all the way back in. Sonata took her shaft gladly, lips trembling along with her body, more and more frequently as her orgasm approached. Sunset could tell hers was coming, too. It seemed like Sonata might come later, so she tried to pull further out and modulate her strokes, only for Sonata to lock her legs around her, holding her in. She tried to break the kiss to warn the siren, but Sonata sucked hungrily at her mouth and pressed one hand to her back and the other to the back of her head, holding her as close as possible.

Sunset gave in. Her flare sealed Sonata tight, and she lost herself in orgasm.

Sonata was close. She felt Sunset's cock pulsing inside her, felt the pressure build in her pussy as the seed swelled it. Then, with a tiny twinge, the first surge of cum passed into her deepest reaches, where the last remnants of her magic still lived. And those remnants recognized Equestrian magic at long last. The raw power flooded into her as joy, and a blinding, heedless orgasm took her. She grasped Sunset as close as possible, craving as much seed as she could get inside her.

As Sonata's orgasm began, Sunset felt it all across her body, not only in the pussy walls milking her cock, but as a tingle of energy across their embracing breasts, through their dancing tongues, and along Sonata's thighs and legs grasping her. Her own orgasm redoubled, and she began emptying her balls in massive waves into the siren.

And, deep in Sonata's body, where she was very much still a siren, Sunset's very-much-still-pony sperm, enchanted for just such a purpose, found a body that, unlike Muffins, was waiting for heart-shaped, rainbow-tailed sperm. And, true to that purpose, the magic brought Sonata Dusk into prime breeding season.

Just as Sunset Shimmer pumped her orgasm-quaking belly plump with fertile seed.

Unaware of any of this, Sunset and Sonata rode out their orgasms. Sunset, barely coming to herself in time, grabbed her shirt off the floor and stuffed it between Sonata's legs as her orgasm faded, protecting the bunk bed from her overflowing sperm. When both had recovered, Sonata went to the bathroom and cleaned up as best she could. Sunset was surprised when rather than returning to her own bunk, she came back.

"Can I sleep with you?" Sonata asked, "I'll feel safer."

Sunset looked over at Lyra and Bon Bon, seemingly intent on bunking together all night.

"Sure," she said.

In Which Things Spread (In Several Senses)

Sunset woke just as the sun began angling into the window, and found Sonata had already left, to her slight disappointment. She sat up and looked around, and was briefly confused when she didn't see the siren elsewhere in the bunk, but then she heard the shower running. Flitter, Cloudchaser, and Tree Hugger all must have returned sometime in the early hours, as they were all sleeping in their bunks. Only Sonata seemed to be missing.

Though it was early and she knew she should be exhausted, Sunset felt fully awake. She shrugged and rose, and went to the bathroom. She told herself it was to brush her teeth, and not with the intent of running into Sonata. Nonetheless, she didn't bother to put anything on under her long shirt, and she was pleased when Sonata softly called out from the shower stall when she opened the door.

"Who's there?"

"Sunset."

Immediately Sonata slid the shower curtain aside. She was grinning and, unsurprisingly, naked. Water rain in rivulets down her blue skin, tracing her shapely form. Sunset thought she somehow looked more attractive than she remembered, though she'd also never seen the siren naked in good light. Still, she was struck momentarily speechless.

Sonata stepped forward out of the falling water. Her wet hair framed her delicate face. The trickles of water along her skin turned to droplets, which sparkled in the early sun slanting in through the high window.

"Good morning," she said, "can I kiss you?"

Still struck dumb, Sunset nodded. Sonata giggled. She leaned forward so her dripping chest wouldn't get Sunset's shirt wet, and pressed her lips close. Water dripped from her hair down the sides of Sunset's face. Sunset opened her mouth. Their tongues danced. Sonata broke the kiss and yanked on Sunset's shirt. Sunset offered no resistance, and Sonata tossed it in the corner of the room.

"Come on, might as well wash up." Sonata turned and walked back under the shower head, her luscious butt flexing as she walked. Sunset thought she might be wiggling it more than necessary. By the time Sunset had come up behind her, her pony cock was pressing between those full cheeks.

"Wow," Sonata giggled again, "you want more already?"

"It's magic," Sunset shrugged, "it comes back whenever it wants."

"Mmm, well I'm still feeling great from last night, but don't worry. I'll take care of you."

She spun and squatted in front of Sunset, running her lips over her shaft and her hands on her balls. Sonata never broke eye contact, and she winked at Sunset as she took the flared head into her mouth and began pumping the shaft with her delicate hand.

"Be careful," Sunset moaned, "Pinkie swallowed a whole load and it made her sick."

Sonata nodded, the action causing delicious sensations in Sunset's shaft, and winked again.

Though Sunset supposed she shouldn't be surprised, given Sonata's age and former occupation, the siren was incredibly skilled. Her mouth and hands were extraordinary, soft and firm in precisely the right ratios. Sunset's flare deployed in what seemed like only a few minutes of delirious pleasure. Sonata pulled her lips back to the very edge of it, and the first long rope jetted right down her throat. She removed her lips but kept her mouth open for the second, letting it pour in and swallowing. Then she closed her mouth and licked her lips, the third rope splattering on her cheek. She rose a little, and the fourth hit her collarbone while the fifth painted her generous breasts. Sunset groaned at the sight and the skilled hands still working her shaft, and felt the orgasm pick up, ready to consume the rest of her store of cum. The next few bursts utterly drenched Sonata's chest, then she rose the rest of the way, blasts of seed coating her belly. Finally she turned, and the last long surges of white landed deliciously on her ass.

Sunset's cock disappeared, and she shuddered.

"Wow, thanks," she finally managed, "you sure you don't want me to go down on you or something?"

"Nah, I'm still feeling last night. But you owe me one!" She paused for a bit, then smiled wider. "Hey, wanna be partners?"

"Um, isn't it a bit soon?"

"What? It's not a very long trip."

"Oh! You meant lab partners! Sure."

Sonata raised an eyebrow. "What else would I have meant, silly?"

"Never mind."

"You're weird, Sunset. Come get washed off!"

Sunset did.

They made it out of the shower just moments before the wake-up bell rang, and all the other girls were still sleeping, so no awkward explanations were in the offing. Though as the day went on, it seemed increasingly that Sonata meant more by "lab partners" than Sunset had anticipated. They sat together at breakfast, and Sonata held her hand. They sat together on the bus to the sampling site, and Sonata sat very close, and still held her hand.

In Sonata's defense, Sunset didn't try to stop her. She didn't particularly care to avoid the awkward explanation forever, of course. And she did like Sonata, thus far anyway. And she seemed...vulnerable. Not outwardly, she was as bubbly as ever, but it was hard not to interpret the desire for closeness in the context of her revelation from last night. She had, after all, essentially been betrayed by her oldest allies, then betrayed them in turn. Even if their history hadn't been pleasant, Sunset wasn't surprised she felt the need for some reassurance. And it wasn't like she minded giving it. Even aside from sex, contact was nice. She hadn't realized she'd missed the Equestrian custom for physical closeness among friends.

The day passed in a blur. Their assignment was to count plants on a small plot of land on the mountainside. The next day, before they headed back to Canterlot, they'd count a plot the same size just outside the camp, much lower down, to compare which species appeared based on altitude.

They mostly passed the day in companionable silence, but Sonata seemed to brush up against Sunset whenever possible. Once or twice she flashed Sunset, probably intentionally - she wasn't wearing anything at all under her skirt. Sunset was learning what it felt like when the magical dick was about to appear, and she was thus far able to keep it from doing so, but it was taking all her self-control. Still, she found it thrilling more than troublesome, and by the time they were riding the bus back to camp, she was looking forward to that evening very much. She even ran her hand, teasingly, on Sonata's thigh once or twice, savoring her shivers.

That same afternoon, though, events Sunset had not anticipated were unfolding back at Canterlot High.

"All right then Rainbow." Applejack was gazing at the small, blue-labeled bottle sitting on the finishing line of the Canterlot High track. "One lap. First one back here gets the potion. Second has to do what she says."

Rainbow smirked back at her. "After this, AJ, you won't just not be able to beat me at a race. You'll barely be able to walk."

"Oh we'll see about that, girl. I'm gonna enjoy havin' my way with you."

"Be sure to fantasize about it plenty now, because that's the closest you're getting to this," Rainbow turned and smacked her rear. Applejack didn't think her shorts left many mysteries about its shape.

Both girls took their positions on the starting line, the potion right behind them.

"All right then," Applejack started, "ready, set--"

"Hold on." Both girls turned to look, blushing. This late in the afternoon, with most practices cancelled due to members being on the trip, they expected the school to be totally deserted. Instead, they found Aria and Adagio standing next to the track. Adagio's normally huge hair was pulled tightly back with several bands, and both former sirens were wearing (really quite skimpy) gym outfits.

"What do you want?" Rainbow frowned at them. "This is a private race."

"Oh," Adagio said, "we know all about your little race."

"I don't think y'all know the half of it," Applejack muttered.

"Oh but we do!" Aria said. "Muffins told us all about it! That bottle's an Equestrian potion that gives you a cock. And you girls are racing to see who gets to use it on who."

"Muffins told you about our race?" Rainbow said. "How'd she know?"

"No," Adagio rolled her eyes, "we figured that one out for ourselves. She just told us about the potion."

"Fine," Applejack said, "we ain't too keen on an audience, though, so unless you're gonna tattle, you'd best be on your way."

"We aren't going to tell. We want in." Adagio said.

"What?"

"Yeah," Aria said, "we want to show you who's boss. We've lost our powers, and we've gotta live with that. But we want payback from your asses. Literally."

"Why would we want you lamers in our race?" Rainbow rolled her eyes. "AJ can't beat me, sure, but at least she'll give me a good run for it."

"If you're so sure you'll win," Adagio said, "why not let us try? Look," she pulled out three more blue bottles. "Pinkie gave us some of her potions. We'll replace yours. If you win, we'll double it. You can have your own race after. If you can still move once we're done with you, that is."

"Ha," Rainbow said, "I don't even know why you think you've got a chance."

"Hold on," Applejack said, "what kind of trick is this? You've gotta know you can't beat us. Are you just trying to distract us or something? Run off in the middle of the race with our bags or something?"

"Fine," Adagio rolled her eyes, "you want to be sure we'll follow through?" She reached down and pulled off her gym shorts in one smooth motion, giving a little kick with one long, shapely leg to fully remove them. She wasn't wearing any panties. Beneath her wide hips, her slit was shaved completely bare. Applejack couldn't help but stare. Adagio through the shorts at Rainbow Dash.

"Collateral. I can't go far without those. I'll take them off you once I'm done with you."

Aria turned around, bending over to remove her own shorts. Doing so gave Applejack and Rainbow a clear view of her skinny lilac ass above her own shaved slit. With a wordless smirk, she threw the shorts at Applejack, who caught them reflexively.

"All right," Rainbow said, "prepare your asses. Literally."

"Hold your horses," Applejack said, "why are we even doing this, Rainbow? I wanted to race with you, not these jokers."

"They called us out!"

"It's okay, Applejack," Aria said, "you don't have to race if you're too scared. I don't blame you. You can watch us leave Rainbow in the dust. She's got plenty of holes for both of us. You can watch."

"Oh, it is on," Applejack growled, and took her place on the starting line. The rest soon fell in.

"Ok. Let's get these jerks out of the way and get to the real race, Rainbow," she said. "Ready, set, go!"

The race was close - between Rainbow and Applejack. The former crossed the line just slightly earlier, but she hadn't even gotten the cap off of her potion before Applejack had to, and was uncorking her own. Both downed them in a single gulp.

"Whoa," Rainbow said, staggering a little.

Applejack had to agree. She hadn't been ready for the sheer heat the potion filled her with, the mind-fogging lust. She also hadn't been prepared for the size of her dick. It looked ten inches long and very thick. She giggled.

"You're lucky, Rainbow, not even sure you could take this thing."

"I won't have to," Rainbow said, her own new member no slouch, though not as large as Applejack's, "I'm gonna win the real race. But let's take care of these jokers first." They turned to look at the two former sirens, now almost to the finish line. Upon seeing the triumphant Rainbooms and their rampant shafts, the two faltered and turned around to run the other way.

Applejack had half a mind to let them, but Aria's ass just looked so hot, flexing as she worked her legs. And the haze of the potion was all in her head, making her desperately want to bury her massive cock in another human. So instead she chased Aria, easily overtaking her. She tackled her, pressing her to the grass. She felt the siren's muscular ass pressing against her cock through her shorts, and reached down to toss them aside.

Aria must have felt it too. "So...so big," she gasped.

"Having second thoughts there, sugar?" Applejack smirked and pressed the massive shaft slowly between Aria's legs, rubbing her thighs with it.

To Applejack's surprise, Aria moaned, and instead of denying it or trying to get away, she pressed her ass and legs back, parting her own folds around Applejack's tip. She was already soaking wet.

"Whoa there nelly, you really want it, huh?"

"We're sirens," Aria hissed, not sounding pleased about it. "Pursue us. Desire us. We still want it."

Somewhere in the very back of her mind, Applejack worried a bit about this. In the rest of it, though, magical arousal concentrated all of her attention at the head of her cock, poised on Aria's threshold. She plunged in. Aria let out a groan as Applejack sank almost to the hilt, then had to stop.

Next to her, Rainbow Dash had tackled Adagio as well. Her blue cock had vanished entirely inside the siren, who was panting.

"Aria can't even take all of me, Dash," Applejack chuckled. "Think about how full you'll be when I'm all up in you, you skinny lil' thing."

"Hah," Rainbow panted back at her, "never gonna happen. You'll be the one full of my cum next."

Applejack tried for a reply, but Aria's dripping pussy was squeezing her, rapid undulations caressing her entire cock. She felt light-headed. She looked down. Her massive shaft buried in Aria looked utterly obscene, but maddeningly arousing. She moaned and leaned forward, and Aria gasped.

A squeak from the other couple distracted her, and she looked over. While she felt like she'd barely be able to move in Aria, given how tight the siren was, and didn't want to anyway, with the kneading Aria was giving her, Dash was pumping into Adagio wildly. The blonde siren's shirt had fallen to her neck, and she wore no bra. Her larger breasts dangled and jiggled at each impact, and her eyes were closed and her mouth hung open. She let out a little squeak with each thrust.

"Better finish up there soon, AJ," Rainbow gasped, "this is just the appetizer, I'm almost done with her and I'm coming for you next. Or should I say in you?" As if to emphasize this, Dash threw back her own head and gasped, and Applejack suspected she'd begun unloading her seed in Adagio. The siren yelped.

The thought combined with the raising tide of pleasure from Aria's pulsating pussy unexpectedly threw Applejack over the edge. She pressed forward against Aria and the siren's knees gave way in pleasure. Both fell to the ground, but Applejack remained buried.

"Yeee-haw," she yelled, overcome with the feeling of hot ropes of cum blasting out of her into Aria. She looked back over at the other couple, only to see Adagio's tight tummy swelling obscenely with Dash's prodigious load. Her eyes widened, then she felt an even greater tide of pleasure washing over her, and she emptied everything into the lithe girl under her. Her cock vanished, and Aria fell to her side, hands pressed to her bulging belly. The sirens both seemed insensate, lying slack-jawed on the ground.

Dash and Applejack both studied their handiwork for a few moments, then, simultaneously, remembered the potion waiting for them on the finish line. They were off like a shot, dashing the short distance back. Rainbow got there a moment earlier, and grabbed the potion, but Applejack tackled her. Both girls scuffled for a clear hold on the potion. Rainbow grabbed Applejack's shirt, so Applejack responded in kind, and soon both had shed them to avoid vulnerability. Applejack was less sure if she grabbed Rainbow's sports bra to try to gain any real advantage, or if she just wanted her friend totally naked, but Rainbow responded in kind there, too, so soon Applejack's larger breasts were jiggling deliciously against Rainbow's mostly flat athlete's chest as they struggled.

Though it took a few minutes, the struggle was never really in doubt. Applejack was a rodeo champion, and Rainbow was built for speed, not struggle. Triumphantly Applejack lifted the bottle, uncapped it, and chugged the contents. Her massive cock reappeared.

"No fair," Rainbow panted, "it was supposed to be a race, and I won it."

"You cheated. You started running before calling ready set go."

"So did you!"

"Whatever. You gonna chicken out of taking me on? I get it, I've got a lot of meat here, maybe I'm too much woman for you. I'm sure Aria has some more room in her belly."

Applejack made to leave, half in jest, but lightning quick Rainbow's legs were wrapped around her waist, powerful running muscles pulling her tight. Deftly, Rainbow tilted her hips up, and pulled Applejack's entire cock into her skinny frame, before Applejack even knew what was happening. She moaned.

"I'm...I'm not chicken," Dash managed. "Now fuck me hard, not like you did with Aria. I can take it."

Applejack didn't need to be told twice. Though she'd technically done all sorts of things in her bedroom with vegetables, she'd never had sex with another human before. And Dash was the only one she ever fantasized about. She wasn't sure, if she was honest with herself, whether she'd rather fuck Dash or be fucked by her, but being inside her best friend, longtime rival, and secret crush was amazing enough. Per Dash's instructions, she began thrusting long and deep, but each thrust was heaven. Her pleasure was rising quickly.

Dash was moaning and panting too, but Applejack felt her first pulse of cum rising only a few thrusts in. Then it surged out, and she fell on Rainbow, pressing her into the grass as she unloaded. The pressure built inside Dash and then lessened, and Applejack felt her friend's stomach grow slightly against her own. This was too much. She remembered how full the sirens looked, and realized Dash would be like that with her own sperm. She yelled out and unloaded, emptying herself entirely into Dash's writhing body before rolling off.

"Oh sugar," Applejack said, "that was way too fast. Sorry. I dunno what came over me!"

"I'm just too awesome," Dash said.

"I'll finish you off with my mouth if you like." She looked over at Dash, who had another potion bottle in her hand. Then she remembered the sirens offer of doubling their stock if they won.

"I've got a better idea," Dash said.

Applejack was aware that her pussy was still dripping. Though the magical potion provided an orgasm, it didn't seem to have fatigued her body. She couldn't let Dash know just how eager she was.

"I guess you did win the race," she said slowly.

"And you totally got off in me before I got off, you owe me one."

Applejack nodded slowly. "Alright, fair's fair." She flipped over on to her back and lay on the warm grass. Despite just having ejaculated in Rainbow, whose belly was still swollen with her cum, she felt weirdly self-conscious, and waited a moment. Then she thought about how close she was to finally having Rainbow Dash inside her, and she spread her legs, revealing her ready sex to her friend.

"That's what I'm talking about," Rainbow said, and chugged the potion. Without further ado, she sunk herself into Applejack's ready folds.

Every inch of her friend parting her was heaven. Applejack was deliriously aware of Rainbow's head pushing deeper and deeper into her, the warmth of her friend penetrating to her very core. She gasped, then shivered. Rainbow bottomed out in her.

Rainbow began thrusting, balancing on her arms and looking down at Applejack's heaving chest with a grin, but Applejack wanted to be closer to her. The feeling of having her inside was transcendent, but she wanted to be as close as possible to her lover, wanted to savor every bit of contact. She reached up and pulled Rainbow close, pressing their bodies close together. As Rainbow's swollen belly pressed against Applejack's, the pressure forced several large dollops of cum out of her, and they dribbled down her balls and leg on to Applejack's own.

The feeling of her cum dripping out of Rainbow Dash reminded Applejack that her crush was about to pump her, in turn, full to overflowing with her sperm. She shivered. Just the thought drove her wild. Until it all fell out or her body got rid of it, Rainbow Dash would stay inside her. When she went to bed tonight, she would still have the reminder of their mating in her body.

The thought overcame her. She pressed her lips wildly to Rainbow's, opening her mouth and desperately pressing her tongue against Rainbow's lips. For a moment the other girl paused in apparent shock, then she started thrusting harder, and opened her own mouth, and they were kissing as she fucked Applejack's eager pussy.

It was too much. Applejack gasped into Rainbow's mouth as she felt her orgasm washing over her. She clenched her pussy wildly and thrust her own hips up from the ground, meeting Rainbow's frantic pounding. And then she felt it. She felt Rainbow's balls clench, and felt her shaft throb as her insemination began. At first she felt only Rainbow's clenching. Then a pressure inside her as the massive load built up. Then a sharp but welcome bit of pain as Rainbow's cum passed through her cervix and began, with no other option, flooding her womb.

Through her orgasmic haze, Applejack could have sworn she felt something. A warmth, a little motion deep inside her. And she was taken with the idea that somehow, she was ovulating, right now. That despite Sunset's assurances, Rainbow Dash was not just filling her with cum, but with live seed, impregnating her. Though she knew that would be trouble, the thought was impossibly arousing, and she felt herself cumming again, harder.

"That's right Dash," she panted into the kiss, "knock me up."

Dash must not have minded the idea either, because the welcome pain came quicker, and she had another unusual but incredible sensation: the slow swelling of her belly as Dash's cum pumped her supernaturally full.

Finally, they both came down and lay, panting, in the grass.

"Uh, Dash..."

"Yeah, you can."

"What?"

"You were gonna ask if you could kiss me again, right? Any time."

"I wasn't gonna ask that. But uh, I should have." Applejack kissed her again.

A long time later, Rainbow seemed to realize something.

"Wait, what were you gonna ask me, then?"

"Are you sure these things are, uh, safe? Because I just got this feeling like you'd impregnated me for real."

"Sunset was totally clear," Dash said. "Blue's safe. It's easy to remember, because blue's the best color."

Applejack punched her arm.

"I'm sure you're right," though of course she wasn't, quite. "Let's go get cleaned up."

Sunset expected to find Sonata in her bed when she finished brushing her teeth after lights out. What she didn't expect was to find all the girls sitting on the floor of the cabin, huddled around a dim light. They'd stretched blankets between the top and bottom bunks of most of the beds, apparently hoping to hide the light from anyone looking out of the staff cabin.

"Oh hey Sunset," Lyra said, "good! Mind talking for a bit?"

Sunset shrugged, and sat in the obvious empty space in the circle, between Sonata and Tree Hugger.

"Sure, what's up?"

"We've uh, heard some rumors about you lately," Bon Bon said. "And you hooked up with Sonata last night, right?"

Sunset looked at Sonata, who smiled and nodded. She shrugged. "Yeah."

"Oh, neat!" Lyra said. "I didn't know you were into girls t-" she cut off as Bon Bon elbowed her.

"Oh is she ever in to girls," Sonata said, giggling.

"What do you mean?" Moondancer said.

"Oops," Sonata said, "was I not supposed to say that Sunset?"

"Nah, it's okay. It's kind of weird, but it's like this..." she quickly sketched out the story, though without revealing any of her previous partners. She just said she'd hooked up with a few other girls.

"Wow," Flitter said.

"So uh, are you gonna transition?" Bon Bon asked.

"What?" Sunset said.

"Well you like having a penis when you have sex. Did you get misgendered? Do you want us to use 'he' pronouns?"

"Oh! No, no," Sunset said. "It's not like that, I like being a girl. I just...like having a penis sometimes. To have sex with other girls."

"It takes all kinds, dudes," Tree Hugger said.

"Can we see it?" Cloudchaser asked.

"Uh, are you sure? Do you all want to see? We can't leave the cabin, I wouldn't want to make anyone feel weird."

Quickly all the girls indicated they wanted to see. Sunset thought for a bit, then shrugged.

"All right." She pulled out one of the bottles from her bag and passed it around, letting everyone see the Equestrian writing. Then she took off her nightshirt and panties, lay back so everyone could see her crotch easily, and chugged it. There were a series of gasps.

"Groovy," Tree Hugger said, "it's a pony dick. That's far out."

Sonata giggled and put her hand to Sunset's medial ring.

"Oh yeah," she said, "look, it's got this little ring in the middle. Totally feels great when it goes inside you." She ran her hand up the shaft, making Sunset shiver, and then ran it along the flare. "And pony cocks have a flare! When she gets off this folds out and seals you up inside, so none of the sperm can get out!"

"Sonata, that's really..." Sunset groaned at the pleasurable contact.

"Oh don't worry, I'm not a tease! I'm totally gonna fuck you." Sonata grinned. Sunset looked at her in surprise and saw her hand was already in her panties, touching herself. "Unless the girls don't want to see that."

"I, uh, think the poor girl deserves relief." Bon Bon said.

"Whatever, dudes," Tree Hugger shrugged.

"I wanna see this so bad," Flitter said.

Moondancer just nodded.

Sonata grinned at Sunset and pressed her down flat on the floor. Then she turned to face the other girls as poised herself above Sunset's fully erect shaft, giving Sunset a prime view of her luscious ass, slightly spread, and her welcoming pussy lips.

"Come on, get a good look," Sonata said, and slowly began sinking down on Sunset's cock, giving a deep sigh.

"Oh yeah," she said as the medial ring slid into her," that ring gets me every time. I really missed pony cock."

"You like an audience, don't you, Sonata?" Sunset realized belatedly.

"Ooooh yeah," she said. "This is great. I'm gonna cum so hard on you, Sunny. Ooh! We should have sex on the bus tomorrow! It'll be dark most of the way, no one will know. Well except these girls," she giggled, "but that makes it a little better. I love it when it's a secret between us and a few others, and the rest don't know! Can we?"

"We'll see..." Sunset managed, though she was rapidly coming to realize that if Sonata really wanted to, she'd not be willing to say no.

"Oh goodie!" Sonata finally had Sunset's entire cock inside her, and she let out a moan.

"See? I got it all." She reached down and caressed Sunset's balls. "These are really heavy and full because of the magic. Wait until you see how much cum they put in me!"

"Wait," Cloudchaser said, "they make so much you can see it? Like, from outside?"

"Oh yeah, it's great! It's gonna look like I'm having a baby!"

"But you aren't, right?" Lyra said. "Like, it's not really real sperm?"

"It's real," Sunset said, "but there's a contraceptive in the blue potions. It's totally safe. They sent some yellow ones too that have a fertility spell instead, but I'm not sure why."

"It feels nice either way," Sonata said, "it's so warm inside me!"

With that she began fucking in earnest, bouncing up and down on Sunset's cock with gusto. Sunset was lost in it for a while, luxuriating in the feeling of Sonata's silky sex on her and feeling her own orgasm inevitably rising. Then a sound from nearby made her look around, and she found the other girls were enjoying the show almost as much as she was enjoying giving it.

Moondancer had lifted her shirt over some impressively large breasts, and was pinching a firm nipple with one hand while her other hand worked between her legs. Flitter and Cloudchaser had a large double-ended dildo inserted in both of them, and were pulling it back and forth. Lyra and Bon Bon each had a hand inside the other's panties. And Tree Hugger had copied Sonata's stance and was bouncing up and down on three of her fingers as enthusiastically as Sonata was on Sunset's cock.

"Ooooh, I'm so glad you're all enjoying the show," Sonata said, and clenched her pussy hard on Sunset.

Between the sensation and the arousing sight of all the other girls getting off to them, Sunset felt her own orgasm about to begin. She realized their position would make it hard for her cum to get as deep in Sonata as she liked, and she sat up, then rose to her knees, swapping to a doggy-style position without ever leaving her lover.

"Oh!" Sonata said. "She's got so much cum it won't fill me up as deep if I'm not below her. This means she doesn't want a drop to come out of me!" She stroked her stomach eagerly, and her voice was breathy. Sunset found her narration kinkily arousing, and felt her flare stiffening.

"I...I feel the flare..." Sonata mumbled, "she's about to give it all to me...oooh..." Sonata descended into orgasm, and Sunset followed. All around the girls' eyes were glued on Sunset and Sonata, even as their hands worked furiously on, in, or around their own sexes. The air was filled with musk and gasps of pleasure.

Sunset's ropes of cum surged into Sonata. The familiar pressure built as her pussy filled, then slackened as the cum surged deeper in. All around the girls gasped as Sonata's belly swelled with cum, and the noise drove Sunset deep into the orgasm, emptying it all. Like a wave, each of the spectators peaked in turn, gasping and twisting on fingers or toys before falling silent and satiated, and Sunset wondered how many of them she'd inseminate before graduation. Still she flooded Sonata with her seed. Finally, they too came down.

No one seemed to want to talk much, after. Instead, each of them climbed into their bunk with a perfunctory goodnight. Sonata went to the bathroom to let the load drain out of her, then crawled, to Sunset's lack of surprise, into Sunset's bunk with her. Sunset was already half asleep. She wrapped her arms absently about Sonata, and both fell into exhausted dreams.

In Which Scientific Progress Goes "Oh Yeah Just Like That" And Similar Exclaimations

Sunset thought her slight stagger getting off the bus was probably not visible. True to her word, Sonata had mounted her once full dark hit on the ride back to the city. Though enough of her load now lay in the bus's septic tank that her lover's belly wasn't noticeably distended, she still felt weak from the intensity of her several clandestine climaxes.

When she turned to look behind her at the recipient of those loads, though, Sonata's distress was entirely visible. She almost asked what was wrong, then realized.

"Oh. Sonata, you don't have anywhere to go, do you?"

Sonata shook her head.

"O-oh, don't be silly! I can go back to my place," she said. "I'm sure the others don't know anything's up!" Sunset knew she was attempting to smile, but only via context clues. She sighed.

"Don't be silly, Sonata. You shouldn't go back to people who've hurt you. You'd better stay with me."

"R-really?"

Sunset nodded.

"I told you I'd make sure you were safe. If you want to come to my place, you're welcome."

"Then I will." Sonata fell into step beside Sunset, walking towards the parking lot where her motorcycle waited. A moment later, "Thanks, Sunset." Then another moment later, she giggled, "I bet I'll cum at your place, too."

Sunset rolled her eyes, but couldn't suppress her grin. Still, as they walked to her motorcycle, Sonata still looked a little down.

"Something else up?" Sunset asked. Sonata was silent for a long moment.

"Um, I'm kind of worried about something. But I'm don't want to talk about it until I'm sure. Wasn't that new Twilight working on ways to detect magic?"

"Not working on, she's already got it. She used it on me a few days ago to see what kind of effect this spontaneous dick growth was having on me." She blushed remembering it.

"Oh! Do you, uh, think she'd use it on us?"

Sunset chuckled.

"I'm sure you just have to ask, that girl never met a data point she didn't like. You sure you don't wanna tell me what's up, though?"

Sonata nodded. "Can we go now?"

"If she's up for it, sure. Let me give her a call and see."

Twilight's phone rang to voice mail, but Sonata looked so crushed at the news that Sunset didn't want to just give up on it.

"She might have left her phone upstairs while doing lab work. She was worried for a while that the signals might interfere with her magic-detecting instruments. It's not far from my place, we can go by and see."

Sonata perked up and clung to Sunset's arm.

"Thanks, Sunset!"

Twilight's house was dark - Sunset wondered if her parents were ever home - but they walked around back and saw telltale cracks of dim light coming from the sides of the basement curtains and under the folding cellar door that served as Twilight's late night entrance and exit. Encouraged, Sunset knocked on the folding door.

For a long moment, there was no answer. Sunset knocked again. Just as she was about to leave, a faint "coming" echoed from below. A little while later, the door opened with a mechanical whir, Twilight having automated it some time ago. The skinny girl stood framed by the light spilling out from behind her. Her normally orderly hair was frazzled, and she wore her pajamas askew.

"Hey Sunset," she said brightly, then turned to Sonata and blushed. "Oh, and Sonata, what a surprise."

Sonata couldn't suppress a giggle, and Sunset had to fight it down.

"Uh, Twilight, you've got something..." Sunset gestured to the left side of her mouth, in the location where a strand of what looked like cum was sitting on Twilight's face. Her friend flushed royal purple.

"Oh." She wiped her finger over it, then licked it off. The taste seemed to make her realize what she'd done, and she somehow managed to blush even harder.

"I hope we're not interrupting," Sunset said. "Sonata came to me on our trip because she's worried the other Dazzlings are going to try something against us. She's hoping you'll do some tests on her."

Twilight took a moment to find her voice, but eventually did so.

"Oh! Well I was uh, doing some experiments with Rarity, but we're mostly finished. And I have news for you anyway, so you might as well come down." She turned below and called, "Rarity, Sunset and Sonata are here."

"Oh, do show them down," Rarity's voice echoed back.

Shrugging, Twilight walked back down the stairs, and the other two girls followed, the door closing with another whir behind them.

Twilight's lab reeked of sex. If the semen on her face hadn't made the nature of the experiments clear, the smell would have. Well, that and Rarity's state. The ivory-skinned beauty was lying on the bed-cum-exam-table, completely naked. Her belly was slightly swollen, and she wore a devilish expression.

"Oh so good to see you Sunset! As you can tell, we were advancing the cause of science. And Sonata too! What brings you here?"

Quickly the two went over the trip. Given the company, they didn't see much need to leave out the steamy details, especially since Rarity specifically asked.

"So, what do you want me to do, then?" Twilight asked.

"See how magical Sunset is, and how magical I am," Sonata said.

Twilight nodded. "Deal, but only if you tell me what you're worried about after."

"Deal."

The scans took about fifteen minutes for each of them. Rather than just using Ethyl 2, Twilight ran as many instruments over each of them as she had the last time Sunset was here. Rarity watched keenly, if distractingly. In the end, Sunset's magic was the same as always. Surprisingly, though, Sonata showed some - almost as much as one of the Rainbooms did when they ponied up.

"How did that happen?" Twilight looked at her screen, scratching her head. "I thought only your gems let you use magic."

"They let us capture it," Sonata said. "But we're not humans, we're magical. If we were in Equestria, we'd use the magic that's all over the world, just like land ponies. The gems just let us get more in different ways. And they let us do it here, where there isn't any magic to get from the world. But now I have some."

"Wherever did you get it, dear?" Rarity asked.

Sunset blushed. "I spent the whole trip pumping it into her. Is that what you realized, Sonata?"

Sonata nodded. "When Sunset and I first slept together, I felt a little spark or something. I didn't know what it meant at the time, but then I felt it again every time."

"But wait, why'd you get my magic tested, then?"

Sonata looked down at her feet.

"I wanted to be sure. I wasn't trying to use my magic on you, but I really like you. You've been so nice to me! But then I worried maybe it was my magic. I was worried maybe I'd made you like me without meaning to."

"This is enough magic to do...that?" Twilight asked.

"I don't think so," Sonata said. "But I was a bit worried."

Sunset hugged her. "You've never really had a friend, huh? Other than the other Dazzlings, anyway."

Sonata shook her head.

"Well, it's real, I promise." Sunset thought for a bit, then she swore.

"Sonata, do you feel like the magic's stronger than it was earlier?"

"Oh yeah. But then, you keep giving me more." She giggled.

"No I mean than like, when we got off the bus."

"Oh...maybe?"

"Why would it be?" Twilight asked. "How would she have more magic without getting any more, uh, put into her?"

"I guess I'm the only one who studied magical theory under Celestia," Sunset grinned at her silliness. "That's one of the things that makes magic, well, magical. It's anti-enropic. The best way to get more magic is to use it. When I use the potion and put magical semen into one of you, it doesn't do much, because your bodies can't metabolize or use it. So it just washes away, and eventually dissipates into such a low concentration that it's not doing anything. But Sonata can metabolize it just fine. She's not doing anything with it actively, but her body is, and it'll keep growing. If she used it, it might grow faster. Of course everyone has their limit on how much they can store, but she probably has a lot. I think that must be Adagio and Aria's plan."

"I think you lost me, I'm afraid," Rarity said.

"The potions! They must have found out about them. If they can get someone to fuck them with one of the potions, they'll get magic back in them. And once they do, it'll grow until they get some of their powers back again, just like Sonata did."

"Oh no," Twilight said, "that probably wouldn't be good. Let's warn the others." Sunset typed out a quick text message to the other girls, letting them know what was up and asking if any of them had given away potions.

"In the mean time," Twilight said, "I've learned a lot since I last saw you! First, I tested the semen I produced when I took the 'fertile' potion, and I don't think you need to worry about knocking anyone up. It's intensely magical and not human at all!"

"Wait, yours too? The nurse took a look at mine after an accident, I was worried I'd knocked up Muffins, but it was pony sperm. I thought I just made it because I got a pony cock, though?"

"Apparently not, mine was the same. It's still got some powerful magic, though. Even though it wasn't designed to work on humans, internal exposure of any kind magically causes the subject to advance to their most fertile instantaneously. So if you were to use it on a human and then she had sex with a human male, she'd almost certainly get pregnant."

"How did you figure that one out?"

"Oh, we tested that just before you arrived," Rarity purred. "Not only am I very satisfied, I'm also very fertile right now."

Everyone was silent for a moment.

"Wait a minute," Sonata said. "That's what the warm feeling was! I wasn't feeling magic, I was going into season! I forgot what it felt like, since this body doesn't usually do it."

Sunset looked at her. "Wait. How could that be? I was using the sterile potions. They had the blue label and everything."

"Dunno! But that's exactly what it felt like!"

Sunset felt a sudden coldness in her stomach, until she remembered the magical rainbow sperm. "Well, not like it matters since they're not the right sperm to knock anyone up."

"Nuh-uh! They're just not right to knock up humans!"

All the girls looked at Sonata, who was grinning like a girl who wasn't facing down an unplanned pregnancy.

"Twilight..." Sunset began.

"I don't know what a pregnant siren would even look like, in terms of readings. Besides, if they're anything like humans, we wouldn't be able to tell for a while, until her body started showing hormonal changes."

"But you can tell the potion made me fertile, and we just did that," Rarity said.

"Right, and I could maybe tell if Sonata's fertile too, if she's got human-like signs," Twilight said. "But I wouldn't be confident, and we wouldn't know if the potion made her that way, or if she needs magic to breed, and so the magic itself enabled it."

"Oh yeah," Sonata said, "that could be it."

"I dunno," Sunset said, "it seems like a big coincidence. What if something's wrong with the potions?"

"We know the blue label ones aren't normally fertile," Twilight said, "I did comparison tests. But maybe some got labeled wrong."

"I have a few on me still from this batch," Sunset said, "can you look at it under a microscope or something?"

Twilight shook her head. "As far as I can tell, both liquids are identical to all physical tests, and I'm nowhere near the level of analysis of magic I'd need to distinguish them. Either my instruments aren't precise enough, or the contraceptive spells and the fertility ones have the same kind of energy." She paused, and blushed. "The only test I know of is seeing if insemination causes fertility."

"Oooh," Sonata said, "that sounds fun!"

"Not for you, darling," Rarity said, "we can't tell if you're fertile or not. Besides, you might already be."

"I guess I'm not..." Sunset said.

"Right, but you might have the same problem as Sonata," Twilight said. "If the mirror didn't change enough of your internal anatomy, one of us inseminating you might get you pregnant. But...I'm not fertile right now." She was blushing furiously, but Sunset could see her large nipples, hard through her thin pajama top. As she watched Twilight unbuttoned the top two buttons, letting her tiny breasts free.

"Oooh," Sonata said as she stripped, "nice."

Sunset's body agreed, and she felt her panties straining as her cock manifested inside them.

"Go get your potion, dear," Rarity said to Sunset as Twilight shed her top, "I'll make sure she's nice and ready for you."

Sunset went to her bag and pulled out one of the potions. Filled with doubt, she double checked. The label was certainly blue, and the Equestrian text on it certainly indicated it was safe. What could have gone wrong? Hopefully Sonata was just wrong. But there was only one way to find out. She quaffed the potion, feeling the tingling heaviness of additional semen in her balls, and turned back to the others.

Sonata had stripped, apparently in solidarity with Twilight and Rarity, both of whom were totally naked. Rarity was working between Twilight's legs as the purple pixie sat on the side of the bed, Rarity's own full ivory ass moving irresistibly as she did so. Sunset moved towards them. Rarity must have heard her, because she turned from the panting Twilight to grin at Sunset.

"All ready for you, darling. I must say she's very wet. And we also found something else interesting." She stood, revealing Twilight's prominent lavender cock and full balls, perched above her soaked pussy. "You aren't the only one who doesn't always need the potion." Rarity moved over and whispered in Sunset's ear, "if you get under her, I can take care of that."

Sunset nodded and grinned at her, and moved over to lie face-up on the bed. She put her hands around Twilight's waist and guided the slight girl to her ready cock, letting Twilight sink on to her with a sigh, facing Sunset. She looked up into Twilight's eyes and smiled at the look of bliss on her friend's face.

Then her line of sight was broken by Rarity's deliciously round rump, as the debauched fashionista lowered her own dripping pussy onto Twilight's ready cock. The extra weight pushed Twilight down hard on Sunset, and all three girls let out a moan as both cocks lodged as deeply as possible inside the eager pussies.

Rarity reached down and grasped Twilight's ass with both hands, pulling her up and down in time with her own thrusts. Each stroke pulled her beyond Sunset's medial ring, then brought her down to full hilt. She saw Rarity was bringing the same to herself. Sunset saw the purple cock nearly clear Rarity's body at each up stroke, Twilight's heavy balls jiggling, then saw Rarity's cheeks part as she lowered herself again. It was hypnotic, and made her want to ravish Rarity next.

Sonata also apparently enjoyed the show. Sunset noticed her standing next to the bed, running one hand on her nipples and the other between her legs, staring intently at the three-way coupling.

"Don't be silly," Sunset panted, and grabbed her hand, pulling her toward the bed. At first Sonata seemed confused, but when Sunset yanked one of her legs towards the other side of the bed, she caught on. Sonata spread herself above Sunset's face and began lowering her crotch. Sunset's nose filled with Sonata's heady musk, and she closed her eyes and extended her tongue to lick the siren's dripping slit.

The juices were heavenly. Sunset wasn't sure if it was a natural property of sirens, if she could taste the magic, or just if the knowledge Sonata might be carrying her child made her taste better, but she'd not had anything like it since Equestria. She eagerly went to work, scooping out the delicious nectar with her tongue, which also seemed to drive Sonata wild.

Sunset seemed to enter a timeless place. On her cock, Twilight rose and fell deliciously, her tight opening caressing the magical shaft from top to bottom. On her lips, Sonata squirmed. She could see nothing, feel nothing except her lovers. The tide of pleasure rose and rose, not concentrated and sudden like a simple fuck, but a whole-body, gradually rising tide, every moment just slightly better than the last, a dazzling panoply of smell, taste, and above all, touch.

Finally, distantly, she noticed Sonata's legs clenching around her face, noticed she was drinking even more nectar down. She noticed, too, that her flare seemed to have hardened, sealing Twilight's pussy tight. She felt a heavy weight, as if Rarity's legs had given out, and felt Twilight's balls pressed against her, twitching as if they were unloading seed.

Then the pleasure rose just a tiny bit more, and her balls were too. Her mouth was too busy to yell or pant, so she moaned. She felt the pressure build as her semen flooded Twilight, and her pleasure kept ticking up, bit by bit. She realized Twilight would have to move soon, that her seed couldn't drain into her lover's womb against gravity, but Rarity was still heavy on them, and Twilight's balls still twitched as she pumped more and more into Rarity.

Then, the pressure eased, and she realized the fullness had overcome gravity, and Twilight's womb was flooding with her seed. Twilight's potentially magically fertile womb, and her potentially magically fertile seed. She knew Twilight was sure the magical semen couldn't impregnate her human body, but Sunset wondered. After all, it was magic, right? And it was doing everything else to make sure they'd conceive, including bringing Twilight into season. So why not? She imagined Twilight on one of her arms, Sonata on the other, both grinning and obviously pregnant.

She moaned harder into Sonata's dripping pussy, lapping up the intoxicating liquid, and her seed surged harder into Twilight.

Finally, she felt a surge of seed on to her thighs as her cock vanished. All three of the other girls fell to the large bed next to her, panting. Twilight and Rarity's bellies were swollen. Sunset moaned, still somehow horny in the aftermath.

Twilight rose unsteadily and went to her work bench. She pricked herself with a needle, then ran the blood into a small instrument. After a moment, the computer let out a little beep.

"I'm fertile, all right," she said. "Sunset, I don't know how it happened, but that was the wrong potion."

Sunset didn't hear the rest of what Twilight said. She knew she should be worried, but Sonata immediately leaned down and whispered in her ear:

"I'm glad you're my stallion, Sunset."

It was too much. Her cock sprung forth again, and Sonata was on it immediately.

"Let's make sure it took," Sonata whispered.

Sunset knew she should stop, just in case it hadn't. But it was too much. Instead, she rolled over, pressing Sonata beneath her and plunging her cock all the way inside her, making sure the siren would take the full load. Next to them Rarity was lying on her back. She said something low and seductive that Sunset didn't process, one hand on her swollen belly, the other fingering her pussy. Sunset was about to promise Rarity she'd be next, when the bed shook as Twilight arrived, pressing her resummoned cock between Rarity's spread legs.

Sunset realized they were unlikely to discuss the findings fully until much, much later.

In Which Sunset Somehow Gets Off Clean (But Also Gets Off Messy, As Usual)

Sunset woke groggy and, even given what she'd already done in the past few weeks, a bit embarrassed. Though she thought it was likely she'd have a lot more sex with all of these girls, in the soberness of the morning after, she was keenly aware the night before had been a bit much. Caught in the moment, she'd risked impregnating Twilight - and had enjoyed the risk. The thought still brought her a twinge of arousal, but it was tempered heavily by the knowledge that she'd let her dick get the best of her, and that she'd really rather not impregnate anyone for a few years at least.

Of course, that also hadn't stopped her from doubling down on pumping the seed they now knew was fertile into Sonata, the one most likely to be receptive to it. She groaned, and wondered why she was up so early. She seemed to recall her dreams, wrapped as she was in breasts and legs and some still-damp fluids, had been far more pleasant than this guilt.

Then Twilight's phone beeped again. The purple girl groaned and sat up, unintentionally leaking a healthy load of someone's cum on to Sunset's leg. She fumbled with the phone.

"What's up?" Sunset whispered, though Rarity and Sonata were already sitting up. Sonata immediately leaned up against Sunset's shoulder.

"Applejack and Rainbow Dash replied to my warning text," Twilight said. "Let's see...Applejack's says 'call me,' that's probably not good. And Rainbow's says 'yeah, AJ and I hit that so hard, those pussies were tight'. I guess that explains it, but that doesn't seem good."

Before Sunset could say anything, Twilight's phone beeped again. "Email from Principal Celestia? Oh, it's to all seniors. For the first time since the Battle of the Bands, Aria and Adagio are putting on a concert? Noon today?"

"But it's Saturday," Rarity said.

"It says attendance is strictly voluntary," Twilight said, "but everyone loved their songs and they think they're harmless now, so I'm sure a lot of people will show up. Even if they can't enslave the whole school, I'm sure they can get enough magic out of it to cause a lot of trouble."

Sunset glanced at her own phone. "It's almost 11. Let's hurry."

"What are you going to do?" Sonata asked, voice trembling slightly.

"I dunno," Sunset said, "but we usually figure it out. You can stay here if you want, I'm sure. We understand if you don't want to confront your old crew."

For a minute she thought Sonata was going to take her up on it, but then she shook her head. "You helped me. It's only fair."

"Okay, but soon we really have to talk about," Sunset gestured to Sonata's belly, "this."

Sonata giggled. "Don't worry, I'm a siren. I've been pregnant loads before."

"Yeah, but you weren't a human teenager before! That's a big deal!"

"Girls," Rarity cut in, "I'm sure this is an important conversation, but I imagine Sonata won't be giving birth before noon. So if we're going to stop the other sirens, we all need to get in the shower, chop chop. No one will let us into a school function covered in semen."

Despite their hurry, it was nearly noon when they arrived at the school, and the lot was full of cars and bikes. They rushed to the auditorium, but as they approached the familiar sounds of the Dazzlings' music already echoed in the halls. They met the others just outside the auditorium.

"There you are!" Rainbow said. "We tried to get the principals not to let them on the stage, but they said we were being paranoid! What do we do?"

"Did you bring the instruments?"

"They're in the band room."

"I guess we improv, then."

They rushed to the band room and grabbed their instruments, then hurried back. Without amps, Sunset wasn't sure how they'd make themselves heard; she hoped their magic would take care of that. They burst in, instruments at the ready--

Only to find that nothing appeared to be amiss. Though Adagio and Aria were belting out on the stage, and sounded nice, there was no haze of magic in the room, and no one appeared to be quarreling or behaving strangely.

"Oh, are the Rainbooms up next? Groovy!" Tree Hugger gave a thumbs-up from next to the door, accompanied by scattered waves and smiles from other nearby students. On the stage, the Dazzlings glared at them. They finished the song, then jumped down from the stage and stalked towards their rivals. Shrugging, Flash Sentry took the stage with his guitar.

"You! You did this somehow," Aria pointed at Sunset, "or you, traitor!" She jabbed a finger at Sonata.

"Did what?" Pinkie asked.

"I don't know, but it isn't working! We took filthy loads from those two," she waved a hand at Applejack and Rainbow Dash, "and didn't even get our magic back!"

"Yeah, no" Rainbow smirked, "nice try, but you can't fake liking it that much. You didn't mind taking our loads."

Aria blushed, but Adagio just blustered on. "Well? What'd you do?"

Sunset shrugged. "I've got nothing. We just figured out your plan and came to stop you." The others shrugged too, except Sonata, who suddenly started giggling.

"What's so funny?" Aria demanded.

"You don't have any magic because your eggs are eating it all up!"

"What are you talking about, idiot?" Aria glared at her. "They took the safe potions!"

"Oh," Sunset said, realizing.

"Oh what?" Rainbow looked worried.

"We discovered it last night," Twilight said, "some of the bottles aren't labeled right, somehow. You must have taken the turbo-fertile ones by mistake!"

"Turbo...fertile?" Applejack asked slowly.

"Nonsense," Adagio said, "we aren't sexually compatible with filthy apes."

"But we are with ponies, and the potions always make pony sperm!" Sonata grinned.

"Oh whew," Rainbow said. "We're okay, AJ!"

"Yeah," Applejack said slowly, though Sunset thought her expression was mixed. Then, "wait, except we knocked up these varmints!" She pointed at the two sirens.

"Oh yeah," Dash sighed.

"This is the worst, Adagio," Aria yelled. "Your dumb plan didn't just fail, it got me knocked up by a monkey!"

"And you loved it," Dash reminded her helpfully.

"I just don't understand how we all used the wrong potion," Sunset murmured.

Suddenly from the crowed of stunned onlookers, laughter echoed briefly over Flash's riffs.

"Once again, the Great and Powerful Trixie has saved the school! No thanks to you, Lamebooms."

"Explain," Adagio glared at her.

"Well, after Sunset here spurned Trixie's generous advances, I broke into her locker. Clearly her disrespect needed to be punished. I didn't know what her bottles did, but I swapped all the labels. I thought they'd change it so her partner got the dick instead, but this is even better! Now I've gotten revenge and saved the school too! Trixie, away!" She dropped an unconvincing smoke bomb and fled, but this did nothing to prevent Adagio and Aria from tearing off after her.

"Why is no one else concerned that we have three unplanned pregnancies at our high school," Sunset sighed.

"I never planned on being a daddy," Applejack muttered.

"Silly, it's no big deal," Sonata said. "We've all been pregnant loads of times. Heh, loads."

"Sure, but you were...sirening. You're in high school now! You can't hide a big belly for nine months! Though I guess you'll graduate before you come to term..."

Sonata giggled. "That's silly. I'll eat salty foods for a few weeks then go lay our eggs down in the river. No one will even notice and I'll be done before prom. Unless you want to knock me up again."

"Buh?" Sunset said.

"She's not fully human," Twilight said slowly. "If she were, you couldn't have gotten her pregnant at all. She's probably right that she'll follow whatever reproductive cycle she always would if she mated with a pony."

"Duh," Sonata said.

"So...you'll be fine, and we'll have, what?"

"A bunch of seapony babies living down in the river!"

"Do you like...take care of them or anything?"

"What? No way, there are zillions, that'd be way too much work! Nah, the eggs will float down to sea and they'll take care of themselves."

"Wait," Applejack said, "so we just spawned a new species?"

"Well, new to Earth," Twilight said.

"Awesome," Rainbow said.

"Genetic diversity might be a problem...." Twilight muttered.

"Hear that AJ? Next time I'm doing Aria," Rainbow said.

"There won't be a next time, they called us monkeys! Like, in a bad way!"

"Eh, they'll come around, Adagio loved my cock."

Sunset tuned them out, and looked at Sonata.

"So...everything's going to be fine?"

Sonata nodded.

"How? I lost control of dangerous magic from another world! We impregnated three of our classmates! How did it just...turn out okay?"

Sonata shrugged. "You got lucky." Then she grinned. "You will again. A lot, if you want."

Sunset rolled her eyes, and was about to reply, when she became aware of a growing chant among the crowd.

"Rain-booms, rain-booms!"

"Your public awaits," Principal Celestia said, striding in the door. "I didn't expect this to be so popular. Unfortunately, Luna and I have another engagement. Twilight, as class president, can we trust you to lock up the school after everyone is done?"

"Of course, m'am!" Twilight jingled her spare school keys responsibly, though how that even worked, Sunset wasn't sure. It occurred to her that she would quite like to rail Twilight in the principal's office, in some kind of presidential formal-wear. She filed it away.

"Thank you!" Celestia and Luna hurried out, in an action Sunset was convinced was a legal nightmare, though it barely registered on the background weirdness of her life.

"Well," she gestured to the stage, "shall we?"

After two songs, the Rainbooms felt they'd done enough, and prepared to clear the stage for the next act. From the audience, though, came cheers for Sonata. Sunset saw her climbing to the stage, blushing.

"I guess you did miss out on the first act," Sunset said.

"Uh, duet?" Sonata whispered, looking scared. "I never sing alone."

Sunset shrugged, "sounds like fun."

She let Sonata take the lead, and the siren ran with it. She began a low, sensuous song, looking directly at Sunset, and Sunset felt the notes in her groin. She struggled to keep her pony penis from erupting, and looked at Sonata, eyes wide. Sonata just shrugged, but a little grin twisted her full lips as she sang.

Sunset didn't know the song; maybe Sonata was ad-libbing entirely. And after, she couldn't remember a single word. She wondered if this was a little bit of the siren's leftover magic, and glanced at the crowed, but nothing seemed to be wrong. So she embraced it, and ad-libbed back. Though she could never remember the words, she knew they got lower, softer, more suggestive as the two moved towards the mic. Once there, Sonata began dancing close to her as they sang, brushing bodies on bodies, and Sunset couldn't resist. Heat filled her as her cock reappeared, though even so she kept up the song.

Sunset, a bit worried, glanced at the crowd. Apparently she needn't have. Many were still cheering, and the rest were getting even more into it, making out or grinding on the dance floor.

Sunset shrugged and grinned back at Sonata. They danced close, running hands over each other everywhere, not caring who saw in the crowd below, still crooning out the deep, sexy song. Then Sonata twirled around Sunset, ending up standing between her and the crowd. In a dramatic pose, she stood legs askew and pressed one hand to the stage, then threw both hands to the sky, 'accidentally' catching the front of her skirt where it faced Sunset. The contact flipped it up just enough for Sunset to see Sonata's naked slit, and the moisture on her thighs. Then Sonata jumped.

Sunset wasn't sure how she saw it coming, let alone how Sonata knew she would, but her reflexes were up to the task. She found Sonata's legs wrapped around her, and her own arms were somehow below her, supporting her silky legs and firm ass. Sonata managed it wonderfully - her skirt had flipped up in the jump, and now lay around Sunset's stomach, leaving Sonata's dripping pussy separated from Sunset's eager pony prick only by the thin, strained fabric of her panties.

Sonata's song reached its peak, and she began winding it down. Sunset followed suit. As the last notes faded, Sonata reached one arm behind Sunset. First she caressed her rear, making Sunset shiver, then began tugging on the panties.

"This is why I never wear them," she whispered, "you never know when they'll be a pain."

Sunset blushed. "You're doing that up here?"

"I'm going to do you up here," Sonata corrected. "Unless you think they'd mind..." she nodded at the crowd.

Sunset looked out, and had to admit it seemed they wouldn't. What seemed like half of the grinders had shed at least some clothes, bras and panties, undershirts and briefs, thin cloth pressed to thin cloth, hands running over it. Tree Hugger was already naked, generous breasts bouncing as she danced. Pinkie, of course, was too, and had three members of the soccer team well on their way.

On the mats below the bleachers, Rainbow Dash and Applejack were wrestling, if you could really call it that. Both of their pairs of panties lay to the side, and Sunset could see flashes of muff as they tumbled, struggling over a potion bottle. As Sunset watched transfixed, Applejack rose triumphantly and chugged it, then buried a monster cock in Rainbow Dash unceremoniously as the other girl's eyes rolled back.

In growing surprise and arousal, Sunset's eyes roamed more. Rarity had Twilight by the hand, leading her towards the bathroom, then she caught Sunset's eye. She grinned and shrugged, and instead pushed Twilight to the mat, straddling her. She merely pulled their panties aside in her haste to be penetrated, and gazed at Sunset with a wink and licked her lips when she was.

Even as Sunset's eyes swept back to Sonata, she saw the room was progressing rapidly towards orgy. Another member of the football team she didn't recognize was bottomless and pouring lube on Bulk Biceps's massive, throbbing member. Muffins was eating cum out of Pinkie's pussy while both girls were double penetrated - Pinkie in the ass and mouth, Muffins in the ass and pussy. As Sunset watched, Pinkie took Thunderlane's shrinking cock out of her mouth and somehow wriggled around to face Muffins without dislodging Big Mac from her ass; she apparently hadn't swallowed, as she began swapping Thunderlane's cum with whatever Muffins had managed to get out of her pussy as the two began making out. Even as she did, Pinkie rubbed her newly moved crotch on Thunderlane's member; it was already stiffening again, and Sunset could tell where that was heading.

Even Lyra and Bon Bon, all protestations forgotten, were shirtless in each other's arms, making out openly, which for them seemed a bigger deal than Pinkie's personal orgy.

Finally, her eyes met Sonata's again. The siren was still smiling, and licked her lips. Then she glanced down. Sunset shrugged and nodded, and Sonata deftly pulled down her poor strained panties. Those in the crowd still watching let out a cheer as they fell to the stage. Sunset's cock slid directly into Sonata without Sunset even needing to do anything, though she felt a deft shifting on Sonata's part. The siren moaned, and Sunset staggered to the piano bench, sitting heavily, which only drove Sonata harder on to her, making both of them cry out in pleasure.

Sonata kissed her, then broke the kiss and grinned devilishly. Then, Sonata reached down and unbuckled her skirt. She threw it aside, revealing her full blue ass - and Sunset's shaft buried in her - to the whole assembled senior class. Hooting and cheering, plus some loud moaning, followed. Sunset blushed...but inside Sonata, her cock grew even harder.

"I thought I might not be the only one who liked an audience," the siren grinned.

"I didn't know I did," Sunset moaned, fighting to keep herself from cumming right then and there.

Sonata just grinned back, and leaned down to whisper in Sunset's ear. "Mmm, well, come on then daddy. Let's feed our babies."

Sunset nearly came just at that, but latched on to the mystery to keep herself grounded. She wanted to give their audience a show. She lightly bounced Sonata on her dick as they whispered to each other.

"Wait, what do you mean, feed them?"

"Ooooh, we're going to talk about this now?" Sonata moaned. "But, mmm, it's why the others didn't have their powers. Our eggs need magic! In Equestria our bodies make it. Here? Nope."

"Oh, so we'll need to do this a lot?"

"Well, I could have someone else do it, if you're busy."

"How often will they need it?"

"Once a day might be okay."

"Might?"

"Yeah."

"Sounds like we'll need at least two to be safe."

Sonata couldn't help but moan. "That does sound safer. Will you be able to do me that often?"

"For the eggs, obviously," Sunset said. "But you know, it'd be easier if we could do it before and after school. And that'd be easier if you lived at my place."

Sonata gasped in pleasure. "Sunset, are you asking me to move in? Just so you can inseminate me?"

"I didn't say just," Sunset gasped.

"Then yes," Sonata said, and clenched her pussy around Sunset as orgasm overtook her.

Sunset let herself go, then, her flare sealing off Sonata's pregnant womb. "I hope they're hungry," Sunset muttered, and Sonata shivered. Then Sunset lifted her partner up and pressed her back on the piano bench, pressing all the way inside her, and making sure to stay in profile, so the audience could see her load swell Sonata's belly. And then the dam broke. Ropes of cum surged into Sonata and she screamed in pleasure. Out of the corner of her eye, Sunset saw several people in the front row follow suit, cumming in, on, or with their partners, or just own their own, masturbating at the show.

Then Sonata's belly began to bulge as Sunset's massive load filled her. A gasp rose up from the crowd, then moans and at least one cry of, "get over here and do that to me!" Sunset glanced over and saw the orgy in the auditorium entirely renewed, partners going at it again, or in some cases newly, with most of the soloists in the front now paired or trioed off, taking each other in hand or mouth or pussy or ass. Even Fluttershy, looking half-mad, had tackled Big Mac and was riding him mercilessly, his thick farmer dick looking like it might break her, though she seemed not to mind.

The sight made Sunset shiver as her orgasm deepened, and still she pumped into her partner. Finally it was too much, and she pulled out, a huge gush of cum following her onto the poor piano bench. Still she came, drenching Sonata with her fertile cum.

Finally Sunset's dick vanished, and they stood. Gushes of semen fell out of Sonata on to the stage. Sunset staggered with residual pleasure. Sonata took off her cum-drenched clothes, then, naked, took a bow. She pushed Sunset into one, and then tugged down her skirt. Sunset found herself not particularly interested in resisting as she was stripped.

A cry rose up from the fornicating masses: "Encore, encore!"

"How do you have any left?" Sunset called to them incredulously.

"Oh, we'll show you what we have left, darling," Rarity, looking slightly cum-bloated herself, ascended the stage, bottomless but somehow still regal. She turned to a blushing Twilight and knelt, lifting the other girl's skirt. She began licking Twilight's naked slit, then transitioned seamlessly to fellatio as the other girl's cock appeared. The crowd cheered.

"Yeah, I still need to get a piece of this," Rainbow Dash slapped Applejack's bare ass as they ascended the stage on the other side, then chugged a potion and pressed Applejack on to the stage, sinking inside her. More cheers.

"I dunno who wants a turn," Pinky strutted up, basically covered in unidentifiable fluids, "but I probably shouldn't drink any more cum. Anything else is fair game!" For a minute only cheers greeted her, then Blossomforth came up and lay in front of her. Pinkie took the hint and started going down enthusiastically, wiggling her generous rump to show off the other options. After a moment, Fluttershy timidly came up behind her and took a lick of her pussy, and the crowd quieted down so as not to scare her off.

Sunset was surprised to notice her cock had returned. She was so aroused by the sight, she hadn't noticed the heat it brought. But Sonata had, and stroked it with a wicked grin. "Encore?"

Sunset shrugged. "Why not." She began to press Sonata down, ready to plunge in again, but Sonata stopped her.

"Hold on." Her partner fell to her hands and knees, raising her rump to spread her pussy, still leaking Sunset's seed. Sonata looked back at her. "Pony-style, so we can both watch their show," and she gestured to the audience, where once again coupling was in full swing. She looked around her at her friends, all exposed, in the throes of passion, on the stage. Letting out their inner feelings, just like with music. And then she felt it. The magic washed over her, and the familiar ears and tail appeared as she fully ponied up. All around her, she saw the same happen to her friends, who gasped, but were not distracted from their coupling.

"Oh, neat," Sonata said. "Well, stud, come on. Cover me. You know I'm in season." She wiggled her rear, and Sunset decided she was right. She sunk in, and everything became a blur of magic and pleasure again.

Luckily everyone got over their embarrassment and pitched in for the cleanup. It was regarded widely in the school as another "odd time", of which, after all, they'd already had several. Neither Sunset nor Twilight nor anyone else could find any evidence that magic had really been involved this time, rather than music and hormones and relief at the lack of magical catastrophe and, of course, senior year itself, the heady, somewhat magical realization that if you wanted to be naked with these people, this was approaching your last chance.

And, despite the general feeling of "odd time", several relationships did emerge, or become public, as a result of the special Saturday concert. Not the least of which, it turned out, was Sunset's. Of course, she didn't stop having sex with her friends. But it turned out she rather liked having Sonata around, and the feeling was mutual. So even after the few months in which "feeding the babies" was necessary, neither girl found themselves feeling much like moving on. Besides, as Equestrian expatriates, and ex-villains, they had a bond that few others did. Maybe that was enough. But that, perhaps, is another story.

And, of course, Apple Bloom (the other Apple Bloom) kept improving her potions, as ponies with cutie marks in alchemy are apt to do. And so, only a few months after that Saturday, still well before prom, Sunset Shimmer got another delivery from Princess Twilight, another case of potions. This time, rather than the yellow-label variety, the box contained both blue and red, with an accompanying note.

"Dear Sunset Shimmer,

Awfully sorry about the mix-up with the last batch. I had no idea it'd make you pony sperm even if you were a human! But good news, I fixed it! The red potions in there have my new alchemical anatomical adaption system, it's my own invention! They still do the same thing to the mare, or uh, woman, or whatever, where they bring her right into season, but they make sure your sperm's compatible! So whoever you're thinking about when you drink it, you'll be fertile with 'em all right.

They're real popular here on Equestria, and we've already got some super cool hybrid babies on the way because of 'em. Who knew how many ponies wanted to have kids with griffons or dragons or donkeys? It shouldn't come up over there, though, since you're all humans.

Oh, and I know you had a problem before with the labels getting switched, but don't worry, I made the new one so the potion glows red if it's the A.A.A.S. one. It's an alchemical glow, so it'll even glow if you mix it with something, so no chance of another mistake.

Well, hope you enjoy!

Apple Bloom"

Sunset rolled her eyes. "What the fuck, Apple Bloom. Why would you even send these again. I can't imagine what kind of trouble these could cause, let alone once we go to college."

"We'll probably find out," Sonata said.

"If Sonata's not really a full human," Fluttershy said, "are you, Sunset? If you took a red one and slept with, um, Rarity, would you have a centaur?"

"Why would you even wonder that," Dash asked, "that's weird."

"Oh," Fluttershy blushed, "n-no reason."

"We could just throw them away," Sunset muttered.

"Seems like a waste. You can't even get them on Earth," Twilight said. "We'll just have to put them in a bank vault or something until we find someone who wants to use one. Besides, imagine what I might be able to learn from studying them!"

"We are not doing more fertility field tests until we're actually ready to have babies," Sunset said, "but all right. You're right, no reason to waste them. I'll take out a safety deposit box."

And, in its own weird way, Senior Year went on.

THE END

Author's Note

Wow, that was impressive on my part - a multi-month break before the last chapter. Wasn't intentional, I promise - I knew roughly how it would end, it just took a while to find time to sit down and write it! Hopefully it was worth the wait.

Because this is the last chapter of the main story, I'm marking it "complete". That said, I have a couple of epilogue chapters in mind. Do you still ponder the unanswered questions:
-What was so important Luna and Celestia had to flee, allowing their students to get in a highly unrealistic orgy?
-Did The Great and Powerful Trixie get her comeuppance (or her cum-up-ins)?
-Will Lindyne come up with yet more absurd ways to have humans put magical pony dicks inside other humans?

I will probably issue some epilogue chapters answering these questions, but cannot promise it will be soon. So if that's your thing, you might want to leave this on your tracker.

Bonus Chapter: In Which Trixie Gets Her Cum-Up-Ins

Author's Note

Minor evilness warning: this bonus chapter features Adagio and Aria plotting and obtaining "revenge" on Trixie for getting them knocked up. While everything is consensual, the villains remain jerks about setting up situations in which it is likely to be given; they are certainly not as interested in equal relationships as our heroes, and enjoy the power they have over Trixie via her pride and arousal. If you're potentially triggered by such things, maybe give this one a pass.

Chapter-Specific Tagging: double penetration, weird seapony cocks, revenge sex, consent to unusual conditions while aroused, impregnation, cross-species impregnation

Bonus Chapter: In Which Trixie Gets Her Cum-Up-Ins

The Great and Powerful Trixie enjoyed her position on the swim team, of course. Not only was she rightly the captain, her team had reclaimed its rightful place at the top of the local rankings after that unfortunate few months when her teammates Aria, Adagio, and Sonata were all out of action due to their...Trixie couldn't be bothered to remember the lame story they'd told the other schools, really, since she knew the real reason.

She'd briefly worried they would be so upset that she'd singlehandedly foiled their plans to get their magic back via sex and take over the school that they'd quit the team in pique. But only Sonata had left, and then only to do whatever it was Sunset was doing after school. Why anyone would rather hang out with her than with the Great and Victorious Trixie was just impossible to fathom. But she supposed Sonata had always been a bit clueless.

Trixie enjoyed swimming so much, in fact, that she did not even object when Coach Sea Swirl had them keep up their daily practices even after the end of the season, so they wouldn't get too lax over the summer. Trixie did intend to keep swimming in college, after all. She found herself thinking, on the last day of practice before summer vacation, that she should take out a membership at the pool for the summer, and keep coming back, on her own time.

There was one thing, though, Trixie didn't like about swimming. It wasn't the attention of the slightly younger boys who invariably seemed to be in the free swim area as they practiced - Trixie knew she was stunning in her swimsuit, and enjoyed their stolen glances when they thought she was concentrating on her strokes. But the experience always left her distractedly horny by the end of practice, and made the trip back to her house and private space to relieve her tension stretch long.

She dragged her heels a little heading towards the shower on that last day. Though Aria seemed to be cooling down in the free swim area for a bit, Adagio's suit was already sitting on the bench and Trixie could hear the shower running when she got to the locker room. She thought about skipping the shower; she was even hornier than usual today, and she was worried Adagio might notice. But then she thought about taking the bus home wet both between her legs and everywhere else, and decided to go for it anyway. She pulled her own suit off, briefly admiring her perfectly handful-size breasts, and grinning at her ideally tight rear as she passed the mirror. Yes, she thought, those boys were lucky the Pert and Perfect Trixie practiced in their pool.

Still smiling, she entered the shower room. Adagio was under the center spigot, facing away from her. The siren's massive mane hid most of her, but Trixie couldn't help but notice one of her hands seemed to be busy between her legs. She wondered if she'd noticed the boys looking too, and was shocked the siren was so brazen as to masturbate in the public shower!

Before she could say anything, though, Adagio turned around. Her eyes were half-closed, her mouth half-open, and her hand was working not between her legs, but rather in front of them. Because from Adagio's crotch sprung a gorgeous, exotic dick. Yellowish like the rest of her skin, it looked like neither a human cock, nor the pony member she'd seen spying. Instead it was sinuous and looked slick and wet, barely even fleshy. Where the pony cock had a medial ring, it had what looked like small ridges all along the middle, and Trixie couldn't help but imagine what they'd feel like inside her. The head was neither flared nor bulbous, but tapered nearly to a point.

"T-Trixie! I didn't expect you back!" Adagio stammered.

"When did you get that?" Trixie's eyes were glued to the glorious member. "And why does it look like that?"

"I drank one of the potions," Adagio said, "just to see what it was like. But it did the same thing to me it did to Sunset. Now if I get too horny, it comes back." She sighed. "I couldn't help it, swimming next to you the whole time, the way the suit hugs your figure..." Her eyes drifted hungrily from Trixie's flawless breasts to the perfectly formed light furred patch between her legs. "I thought I'd finish before you got back."

Trixie couldn't believe her luck. Even for her rightfully fortunate life, this was unusual. Here she was, horny as a horse in heat, and Adagio was right in front of her. With a glorious-looking cock. Turned on by her.

"Well," Trixie said, taking Adagio's free hand and leading her towards one of the changing stalls with a door, "you're in luck. The Generous and Giving Trixie is willing to help fix your problem, since she unintentionally caused it."

Trixie made sure to wiggle her Platonically-formed rear as she walked. She closed and latched the stall door behind them, then lay on the bench, spreading her Smooth and Lustrous Thighs to reveal her Wet and Eager Pussy.

"Mount me with that unwelcome thing," she said in her best voice of command, "we'll take care of it."

"But..." Adagio moved, but hesitantly.

Most people who knew Adagio would have been suspicious, at least subconsciously. Of course, being caught masturbating in the shower is awkward, but Adagio was never so hesitant or quiet. The Commanding and Imperious Trixie, however, a girl so domme she didn't even have a subconscious, was merely vexed.

"Come on," she wiggled her assets again, "your captain's given you an order!"

"But it was the red potion," Adagio said.

"The new one? The one that works?"

"Yeah, that one."

Trixie bit her lip. Her Pert and Perfect Pussy called out to her that it really, really wanted something inside it. Preferably something that looked slick, with ridges. But Sunset had told them about the red potions, just to avoid any more mishaps. If Adagio's cock were inside her, the magic would advance her to maximum fertility within a few minutes, then keep her there for at least a day. If Adagio came in her, she'd be pregnant, apparent non-humanity of the cock be damned. In fact, it'd maybe create...

"Tell the Great and Powerful Trixie what she would have," she said. "An awful human pregnancy, or easy eggs, like you did?"

Adagio shrugged, member still fully hard and enticing. She stroked it gently with her hand, apparently without realizing it. "Probably the eggs. I don't think there are male sirens, so we're cross-fertile with basically everything, but always give birth to full siren eggs. I bet it'd work the same way for you."

Trixie considered. Even if she were totally fertile, surely if Adagio pulled out, and came on Trixie's Sexy and Firm Body, then she'd not get pregnant. And if it somehow went wrong, how bad would it be? A few months carrying eggs, not even visibly, then just go down to the river and be done with it.

She glanced down at Adagio's magical prick again. The ridges were calling to her. She craved it.

"I understand if you don't want me to follow your order, now that you know," Adagio said.

That did it. Trixie was many pairs of adjectives, but she hated people not following her orders.

"You heard the order," she said, raising up and parting her Firm and Inviting Ass to spread and reveal her sex even further, "you will fuck Captain Trixie senseless, Adagio. But warn her when you are close, so she may decide how she will allow you to finish."

Adagio said nothing, but a moment later she felt her nether lips part as the thin tip of Adagio's benthic cock spread it gently. Slowly she widened around it as the thicker base entered her body. Then the ridges pressed into her. She felt every one massage her passage as Adagio sunk deeper and deeper. and she began panting at the sensation, lost in the feeling, like the waves of the ocean massaging her insides. Finally she felt Adagio's heavy balls jiggle as they pressed against her, the tip of the sublime dick buried all the way inside her. S

Slowly, Adagio began moving, and the tidal sensation was back. Trixie could barely think, barely keep her eyes open, when there was an unexpected beep from Adagio's watch.

"Two minutes," she said, voice slightly uneven, "you're fertile now, Trixie, for sure. Should I pull out?"

"A...are you c-close?" Trixie managed.

"Not yet."

"Then keep going!"

Adagio began thrusting harder, pressing Trixie's Firm and Enticing Breasts hard against the slick bench, unintentionally rubbing her sensitively firm nipples when she pressed back up, desperate to keep the wonderful shaft inside her. Then, just as they were settling into a rhythm, they heard rushing feet in the main shower room, and stopped, silent.

"Adagio," Aria called out, "were are you?"

Adagio waited a moment, then called out. "In the stall, but I'm--"

Before she could finish, Aria crawled under the stall door and stood.

"Adagio, it's back--" she stopped as she saw what was happening in the stall.

Trixie, too, was taking in the sights. Aria was also naked, her body inferior to Trixie's own in its thinness, but standing from her crotch was a cock even more appealing than Aria's. It was of the same general form, but slightly thicker, and the ridges extended further along the length. Plus, Trixie thought that Aria's color was significantly more attractive, and a better match for hers, than Adagio's.

Not, she had to admit, that she was unhappy with the siren currently buried in her to the balls.

"I'll help," Adagio said, reaching out towards Aria's cock.

"No," Trixie said, "Trixie, your Helpful and Generous Captain, will help you both. Aria, you may have the honor of fucking Trixie as well, but you need to wait your turn."

"Uh, sure, I guess," Aria said. "I'll wait to get some real pussy instead of Adagio's hand again."

"Good," Trixie said, clenching said pussy around Adagio's glorious cock, "proceed, Adagio."

Trixie had to admit that Aria watching made the whole thing even more delicious. She could tell she was practically drowning Adagio's cock with her juices, and Aria was gazing slack-jawed at where the other siren was plunging in and out of her perfect azure body. The sensation overwhelmed her, and she could feel herself getting close, so close, to a mind-shattering orgasm...

"I'm very close," Adagio said, "tell me where you want it."

Trixie was too close to even think about any other answer.

"Don't you dare leave," she hissed.

"But I'll--"

"Give me your stupid fish babies, just don't stop fucking me!"

As soon as Trixie said it, she felt Adagio hilt in her again, then each of the tiny ridges swelled, like the flare on a pony cock. It was far, far too much for the Overstimulated and Randy Trixie. She shuddered, clenching her pussy on her guest, as she fell into orgasm. She felt the pulses as Adagio pumped her - certainly fertile - body full of seed. She even felt a little pinch with each one, and realized the thin tip of the siren's cock was gently parting her cervix, just enough to spray the cum directly into her womb, past her body's last natural barrier to fertilization. As she realized just how fucked she was, literally, she discovered it didn't matter; if anything, she came harder.

Finally her orgasm faded, and Adagio's ridges fell back as the siren pulled out, panting. Almost none of her cum followed, but her still-hard shaft was dripping with its own secretions and Trixie's generous fluids. As for Trixie herself, far from being done, she craved more. Luckily as she came to and refocused her eyes, she saw Aria's member, ready and neglected, right in front of her.

The Full but Randy Trixie rose. Was it her imagination, or could she feel Adagio's sperm slosh around inside her as she did? Regardless, even as she got to her feet, none of it dripped from her pussy; her cervix, far from keeping it out, seemed to be holding the seed inside her. In front of her, the two sirens stood, both ready.

"Not done yet, Adagio?"

"It usually has two," she said.

Trixie found herself feeling empty, now that Adagio's cock had left. She decided that she wanted to see just how full she could feel.

"Well then, it seems the Helpful and Giving Trixie still has some work to do here. Lie on the bench," she ordered Adagio, "face-up."

The siren did, her member standing proud above her. It still glistened with fluids from their frantic mating. Trixie grinned, seeing that. Just to be sure, she reached between her legs and scooped a generous helping of fluid from her still-ready pussy on to her fingers, then carefully spread it over her pucker. She put one finger slightly inside, to make sure it moved easily, then, satisfied, squatted above Adagio, slowly inserting the girl's pecker into her ass.

The thin tip, gradually thickening, and the liquid coating the cock made it slide in easily, and Trixie gasped at this new way of being filled. Though she couldn't feel the ridges as well once they passed her asshole itself, they felt wonderfully novel as they passed through it, and her stuffed bowels made her both even hornier, and eager to get the second cock into her hungry pussy.

She spread her legs, and looked to Aria.

"Well, what are you waiting for? Trixie is ready for your cock."

Aria came over, delicious pink member poised at Trixie's entrance.

"I'll warn you when I'm about to cum," she said.

"Just fill me up," Trixie panted, clenching her ass around Adagio, "I can't get any more pregnant." Just saying it made her shiver with inexplicable pleasure.

Grinning, Aria plunged all the way into her in one smooth stroke, bottoming out inside her. The thicker cock made Trixie gasp, and her thrust pushed her down firmly onto Adagio, sandwiching her between the two girls. Both pairs of balls pressed against her, feeling heavy with seed.

"Yesss," Trixie moaned, "use the Ready and Willing Trixie to sate your magical lusts."

As she lay between them, they did so, eagerly. Both sirens pounded her, frantic, lifting her body first into the air, teasing her asshole, then pressing her down, filling both holes and stuffing her to the limit. Trixie had never managed to make herself multi-orgasmic before, but she thought she was now, riding a wave of pleasure that seemed to crest and fall, but never abate, like the ridges, or the sea.

Then, finally, through the haze of pleasure, she felt those ridges bulge inside her, and she came to rest, fully impaled by both sirens, and the wave peaked again as she knew what was about to happen. Simultaneously, Aria and Adagio unloaded in her. She felt the pulses in her rear, but nothing else as Adagio blasted her nerveless bowels full of wasted seed. But in her pussy she felt every delicious wave pass up Aria's shaft and felt the little jolts of half-pain as, once again, a siren's perfectly tapered cock deposited eager seed directly into her fertile womb.

Finally, as Trixie was wondering if it was healthy to cum for so long, Adagio's member suddenly vanished, leaving a steady trickle of her own cum dripping on to her flat belly. Trixie felt Aria's ridges lowering, and wondered if she would have the strength to help her teammate with her second load. But before Aria could withdraw, Adagio reached a hand lazily around and inserted two fingers into Aria's pussy, hidden behind her magical cock. Trixie didn't have the chance to say anything, or even really think. Aria let out a long moan, and pressed forward hard, driving Trixie down firmly on to Adagio's prone body, the siren's generous, pillowy breasts pressing into her back. Aria's ridges firmed up again, and Trixie discovered she could indeed cum a little longer as the second orgasm shook the siren.

This one was different. As with the pony cocks, one long spurt of seed flooded Trixie, surging into her already full womb. She felt it bulging inside her, the seed too much to fit without distending her belly. And then, only then, did she truly understand that she'd told the sirens, ordered them, to impregnate her, and they had.

Of course, being Trixie, it took her almost no time to decide that this had been a wonderful idea all along.

"That was a strange revenge," Adagio said to Aria once they were out of earshot, "I think Trixie enjoyed it at least as much as we did. And she doesn't even know it was revenge."

"Everyone's a critic," Aria sighed. "I think it was perfectly poetic. She got us knocked up, so we knocked her up. But better! In a decade or two, she'll get to know she helped return us to our rightful place of power. And she even told us to do it!"

"You love your clever schemes too much. A simple plan's a better plan."

"Like your simple plan that got us stripped of our powers by a bunch of useless pony-lites? But fine. You want simpler revenge? Think of how much you'll be able to make her beg the next time she gets horny."

Then, Adagio smiled.

Bonus Chapter: Nurse Redheart's Exit "In"-terview

Pre-chapter warning: Lots of age differences in this one, though everyone's over 18 as usual and consents fully to everything involved. Also some only-technically-legal-because-they-just-graduated-or-quit behavior. You've been warned.

Newly-not-nurse Redheart was resolved: she was going to show the potion to the vice-principals during her exit interview.

She'd thought about not doing it, of course. She didn't feel it was technically covered by confidentiality for many reasons, chief among them that sharing the presence of a weird substance at the school didn't mean revealing where she got it, and that magical sex drugs from another world were pretty much outside the scope of terrestrial legislation. But she did feel that perhaps, in spirit, it was. It wouldn't be hard, after all, to make the leap that one of a handful of students must be the source.

At the end of the day, though, she felt it was her duty. The vagaries of school budgeting, plus her own timetable for her new job, meant she couldn't stay long enough to train or even meet her replacement. It would thus fall to the school to let the poor fool know what they were in for, and she felt it was critical to the well-being of the students that she give as much information as possible. While Sunset and her crew would of course be gone, many of their friends were rising seniors or even younger, and she expected at least a few bottles of the potion to appear within the next year. She'd also heard a disturbing rumor from Pinkie Pie that a new generation of weird creatures might appear in the school sooner than one might expect. All in all, better to leave her successor as forearmed as possible. They'd certainly need it. Besides, with all the likely sources already graduated, it seemed safe to reveal.

So she repeated to herself for the thousandth time as she walked through the heavy July air to the house the vice-principal sisters shared, not far from campus. Her timetable was so tight she'd had to leave for job training the day school ended; she'd even had to miss graduation, to her sadness. So there'd been no time for the exit interview. Fortunately, she'd be in Canterlot for her actual assignment, so now that her training was done, she could come back and fill them in.

She'd had plenty of time during the intervening weeks to convince herself telling the principals about the potion was the right thing to do. Or, well, not quite. If she was honest with herself, figuring out it was the right thing to do was easy.

What wasn't so easy was stopping herself from getting so damn horny at the thought.

Redheart had always been comfortably straight, in that she'd enjoyed sex with her two college boyfriends. She'd briefly considered whether she might also like sex with women, then remembered the feeling of a nice warm dick inside her and decided to stay with the men. Then she'd thought about sharing the effects of the potion with her former bosses, and she'd discovered something new - she mostly just liked the warm dicks.

She always would have said that Luna and Celestia were attractive women. Though her access to the school medical records ensured she knew they were in fact true biological sisters, she'd hardly have believed it otherwise; they seemed to her as different as night and day. Celestia's warm, welcoming personality was matched by her pleasantly curvaceous body, one that seemed as suited to the stereotypical welcoming bar girl or sturdy peasant woman as to her true job, though Redheart knew she could be firm when needed. Luna, in addition to the obvious skin and hair contrast, was far slimmer, nearly pixie-like in build, but to Redheart even more attractive.

The first time her mind idly considered what might happen if Luna drank the potion, she knew she was in trouble. From then on, every time she made herself think about telling them, she'd rapidly become aroused. She told herself everything - that they were far older than her (though she wasn't really sure how old). That they were still basically her bosses. That it would be fantastically unprofessional. That it would under no circumstances happen regardless. Still, every time ended up with her in the training facility's bathroom, trying to keep as quiet as possible while she brought herself to orgasm thinking of one (or both!) of their magical dicks inside her.

There was nothing for it, though. The time had come. With a sigh, a heavy heart, and panties as heavy with damp heat as the summer air, she headed to the interview.

Celestia knew well what the students said about her sister. "The Principal of the Night" they called her. A pretty good joke, Celestia had to admit. While it was of course technically true - Luna was the primary contact for after-school activities and night-time alarms or other issues - it also described her uncanny way of knowing things. Luna's past as something of a delinquent was an open secret at Canterlot High, and while she used her knowledge of the furtive dealings students invariably got up to only for safety reasons, never for disciplinary ones, she was nonetheless viewed with a mixture of fear and awe by the shadier students. This was especially true now, several years into her tenure as vice-principal, after she'd run into several recent graduates and talked quite casually to them about shenanigans they'd been convinced had gone undetected by all the school's adults.

All in all, this reputation suited Celestia well. She genuinely enjoyed being "the good one", and felt that students who were uncomfortable with their part in some teenage antic or other were far more likely to come to her for help when they suspected Luna already knew their secrets. Which, in her mind was all to the good.

Besides, it meant no one suspected Celestia herself. Only her sister knew that her own sources and knowledge of the goings-on a the school was even more extensive. In fact, while Luna did occasionally get a scoop on Celestia, it was much more common that she fed the "Night Principal" information. She told herself it merely made sense - Luna needed to know, after all; the night contact had to be aware of things that might happen after hours. But for the most part, she had to admit to herself, she just liked having that secret part of her. It was not the only secret she shared with her sister, though; the students also remained blissfully unaware that Celestia had a weakness for pranks rivaled only by Luna. Throughout their childhood they'd engaged in frequent prank wars, and indeed had not slowed down since.

Tonight, the evening of former-nurse Redheart's exit interview, Celestia was in an unusual position: she felt she was heavily down in the prank war. Luna had gotten her good last Tuesday, a prank so well executed that even now she refused to think on the details. As a result, she'd needed something really special to regain her traditional dominance and restore the sisterly balance.

Fortunately, she knew something that Redheart knew, and that she was pretty sure her sister didn't. A certain secret that, deployed right now, would embarrass Luna for some time to come. And, as an added bonus, it was possible she'd get to find something out about Redheart, as well. Celestia did love knowing it all.

As Redheart's interview was winding down, she found herself cursing her decision to save the potion for last. Of course, the structure of the interview made it easy - the vice-principals asking questions, then Redheart responding. It was hardly likely they'd ask about alien potions at any point in that process, and the "do you have any other feedback for us" stage at the end was, she told herself, the natural place to bring it up.

Still, it didn't make her feel less like she was putting it off, or do anything to decrease the increasingly awkward dampness between her legs. Finally, though, they finished up with the last of the planned questions.

"Thank you so much, Ms. Redheart," Celestia said in her wonderful warm tones. "I'm sure you'll have a few things to bring up yourself, after an eventful term. But first, I have to say my voice is a bit tired, and I've finished my water. Luna makes a wonderful herbal tea, very soothing on the voice. I can never get her to tell me what's in it. I'd love a cup before we go on, if you don't mind, Luna." Luna shook her head. "Thanks. Ms. Redheart, would you like any?"

"Sure," Redheart said. Her water was also empty, though more because having something to do with her hands was seeming increasingly important.

"You know," Celestia said, after some brief small talk about Redheart's new job, "I could use some cookies as well. Luna," she called louder, "get a cookie plate?" Luna shot back an agreement. "I think she might need some help carrying, Ms. Redheart. Do you mind? I'd like to organize my notes a little." Celestia had made copious notes during the exit interview, while Luna seemed to have jotted down only a few things.

Redheart shrugged, thankful for the reprieve, and feeling a slight thrill at being alone in the kitchen with Luna, though she realized it was irrational. Still. it did not abate as she entered and saw just how nice the other woman looked from behind as she stood on her tiptoes to reach the cookie box from the top shelf.

"I'm here to help carry," Redheart said, trying not to sound awkward. The tea seemed already to be ready - two steaming mugs were sitting on the counter.

"Oh, thank you," Luna said. "Do you mind taking the tea while I get these cookies ready?" Redheart shrugged. "Great! Be sure to give this cat mug to Tia, it's her favorite."

Redheart grinned and brought the two mugs out. She gave Celestia the mug indicated, then took a sip of her own. It was a bit hot still, perhaps, but remarkably smooth and soothing.

"It's good!" She said.

"I like to give mine a few minutes to cool," Celestia said, hers as yet untouched, "but it is remarkably good, agreed. One of Luna's many talents."

Luna returned with a variety of cookies, and put them on the coffee table before settling back down herself. She took a sip of her water.

"Now then," Celestia said, "let's finish up. Is there anything you'd like to cover that we've missed so far?"

"Well," Redheart started, speaking slowly and pausing to try to gather her courage. Only the potion really remained. It was now or never.

Across from her, Luna seemed to be fidgeting. She took another long swig of water. Redheart froze for even longer, mind racing. She knew Luna's reputation. Did the Principal of the Night know too? Some of her fantasies had started this way...

"Recently a student came to me with a, uh, unusual issue," she stammered a bit. It was impossible to miss Luna's fidgeting.

"Oh," Celestia said smoothly into her increasingly slow and awkward narrative. "A potion, yes? From Sunset Shimmer?"

Redheart's eyes widened. Shit, she thought she already knows. Luna must have told her. Now I look like an idiot.

Celestia was looking right at Luna as she continued, making Redheart's fear even more acute. "A potion that, when taken orally, has the remarkable property of giving a woman a penis. With associated, ah, intense arousal. Is that right?"

Redheart nodded glumly. "I didn't know you knew."

"Don't worry," Celestia said, "I appreciate you letting me know. And I believe not even Luna knew about that one." This puzzled Redheart. "I heard it very much by chance. Still, you're right our next nurse will need to know. It seems likely that our current seniors aren't the only ones who have access to it." She looked again significantly at Luna.

"The water," Luna said, stammering a bit and glancing at her glass, left unattended while she'd made tea, "Tia, this is low even for you."

"After last Tuesday? You know you have it coming. Please pardon us, Ms. Redheart, I must admit Luna and I have something of a decades-long prank war going. Please don't tell the students, it would make it much harder to keep order."

Redheart didn't get it, and then she did. Slowly, uncontrollably, her eyes were drawn to Luna's crotch, where she could easily see a telltale bulge. She tried very hard not to squirm. She regretted her choice of a skirt, long and professional though it was, instead of dress pants. She'd worried the pants might develop a visible wet spot, but now she was terrified that the smell of her arousal would escape.

"In front of a-a guest, t-though," Luna gritted her teeth, "and an e-employee, no less."

"Not anymore," Celestia said, "not for several weeks. Besides, you're the one who brought it up. You could have just suffered in silence and left our guest none the wiser. I do hope you'll excuse her for a moment, Ms. Redheart, she should clearly go to the bathroom and take care of her little issue."

Luna looked like she was going to argue, then thought better of it and sighed. As she rose her women's dress pants clearly strained at the very appealing looking new addition - they were not designed to hide such a thing, and so did very little to do so.

"W-wait," Redheart was shocked to hear herself speaking, though she didn't really try to stop. "I've s-seen this before. You should probably let me take care of it." She was on her feet, moving towards Luna.

"I'm pretty sure I can figure it out," Luna looked confused.

"Dear sister," Celestia laughed, "can't you tell our lovely former nurse's interest isn't really medical? I think she'd rather enjoy helping you out with this one."

"Oh," Luna's already dark cheeks went nearly night-black. "W-well, that seems very unprofessional."

"Ms. Redheart," Celestia said, "are there any other issues you'd like to discuss before we officially conclude your exit interview?"

There was probably no issue important enough that Redheart would possibly have said "yes" in that moment. Fortunately she was spared the ethical conundrum by having genuinely covered everything.

"No," she said, "the potion was the last, and I guess you know all about that one."

"Well then," Celestia said, "this interview is officially over. Thank you for all your good work for Canterlot High, Ms. Redheart. You're now have no professional relationship with the school whatsoever, no matter how tenuous. Proceed to offer a completely non-professional interaction to my dear incredibly horny sister."

Redheart gulped. This wasn't exactly how any of her fantasies had gone, but it was close enough. She licked her suddenly dry lips, which she realized only after the fact might have looked like intentional seduction. Luna certainly seemed to see it that way; her cheeks darkened further.

"I'd really like to," Redheart managed in a week voice.

Luna thought for a long minute, still blushing furiously. She looked Redheart up and down, then nodded and sat heavily back on the couch, legs slightly splayed. "Yes, please."

Redheart couldn't forget Celestia's eyes on them, though the light sister remained shockingly controlled. But she hardly cared. Eagerly she pulled down the zipper of Luna's dress pants and unbuttoned the button. The overstrained garment nearly burst open, revealing panties completely unequal to the task - several inches of Luna's deliciously dark shaft protruded, head damp with precum. The glorious cock was pressed close against Luna's taut belly by the tortured elastic. Redheart hooked her hands under both pants and panties, relishing the other woman's surprisingly cool skin against hers. Then gently but firmly she began to pull down. Luna thrust her legs up slightly, letting the pants get clear, and then she was laid bare before Redheart's eager eyes.

It seemed she'd shaved clean for whatever reason - none of her remarkable hair was visible around her shaft. Though on some women as slender as Luna the effect might have been to make them look disturbingly young, Redheart thought here it just made her look sleek, in a way that only made her more attractive.

Luna's cock itself was large, and darker even than her other flesh, a deep, rich purple. Redheart could have sworn stars twinkled in it, but she was so horny she couldn't trust herself to be confident. Redheart thought it looked delicious, and moved to act on it.

She began by gently kissing Luna's balls, astounded at how heavy they were, despite Muffins and Pinkie's reports. She thought about where all that weight would end up, and shivered. Then she kissed slowly up the shaft, teasing Luna a bit. The vice-principal responded by running her fingers through Redheart's pink hair, then grabbing, not quite so hard as to hurt, but firmly enough to bring a gasp of pleasure. Redheart took the hint. She brought her lips up and took the whole head of Luna's cock into her mouth, savoring the slightly salty taste. It was somehow richer than the few others she'd had, as well. This seemed far better already than that. Eagerly she took more and more into her mouth. She was too distracted to focus on technique, and too inexperienced to have much anyway, instead exploring the wonderful magical organ with her mouth, relishing the tastes of Luna's flesh and her precum. Dimly, she recognized her fellatee's breath coming heavier and heavier.

"Be careful, Ms. Redheart," Celestia's warm voice came dimly through her haze of lust, "I hear these potions make it dangerous to let the user finish in your mouth."

Redheart blushed at the reminder that they had an audience. She desperately wanted to feel Luna inside her, regardless, but she felt so exposed, she wasn't sure she had the courage to go through with it. Still, Celestia was right - she couldn't swallow a load like that, and getting it all over her face didn't sound any better. Still undecided, she removed her lips and began vigorously pumping Luna with her hand. Though the shaft remained rock-hard, and Luna pressed back into her in arousal, Redheart didn't miss the little sigh the Night Principal let out as she removed her lips.

That made up her mind. She might get too embarrassed to fulfill her own fantasies, but she couldn't also let Luna down. Keeping one hand on the delightful member, she moved the other up, brushing it across Luna's flat stomach as she pressed up the other woman's shirt. Taking pity on Redheart's one-handed efforts, Luna reached her own hands down and deftly removed it, then shed her bra, freeing her small, firm breasts. Redheart let out a low breath at the sight, then squeaked as Luna began unbuttoning her dress shirt. In moments, the experienced vice-principal had removed it as well as her bra, freeing Redheart's own alabaster breasts. Luna nodded, face still flushed, and licked her lips. Redheart had no doubt that was intentional, and it was enough to banish her final reluctance.

She removed her hand from Luna's cock and rose, getting ready to reach under her skirt to remove her panties, but Luna was ahead of her. As soon as Redheart moved her hips close enough, Luna's hands were against her thighs, teasing, then before she could react, under the band of her panties, and then they were gone, and the panties with them. Luna lay back with a little smile, dick full-mast and slick with precum and saliva.

Redheart gulped, then lifted herself up. She was strangely reluctant to remove her skirt, the last bastion of her modesty, and instead left it on, pulling it up to clear Luna's cock before settling herself down upon it. Though the garment theoretically left some doubt as to what was going on beneath, the tiny moan that escaped Redheart's lips when Luna's head spread her open, and the deep moan both women let out when, not long later, she settled all the way on Luna's balls, left little doubt about how deeply Redheart was speared by her former boss.

Redheart had never taken a cock so long or quite so thick before, though it was not large enough to be unpleasant. Instead she paused for a moment, savoring the feeling of fullness, then began pumping her hips on the delightful member, unable to contain her heavy breathing. Overcome, she pressed her lips into the soft skin of Luna's neck, ravenously kissing and sucking. Luna moaned, and Redheart felt the other woman's hands go to the buckle of her skirt, then pause. She looked up, seeing the question in Luna's eyes, thought a moment, then nodded. Luna undid the clasp and threw the skirt aside, leaving both women completely naked. For a moment, the knowledge of her exposure to Celestia gripped Redheart. She knew that the angle left nothing concealed: not the obscene sight of Luna's dark cock plunging in and out of her alabaster body, not the sight of her asshole between her generous, spread cheeks as she rode it. Then the knowledge somehow stopped bothering her, and instead just made the already incredible experience feel even more deliciously forbidden.

"My dear Ms. Redheart," Celestia's rich voice couldn't help but draw Redheart's eyes to the source. Somehow the older sister still sat in her chair as always, looking utterly composed. "You really do have an exceptional body. I don't know where all the poor female-attracted students of Canterlot High will get their fantasies without you."

"D-did they really...."

"Of course! You shouldn't be surprised. You're young, attractive, and of course there's the whole 'nurse' thing. What, did you tell yourself they were just hard or wet during exams because they're always hormonal?" She finally took a sip of her tea. "Oh well, they're teenagers, I'm sure they'll cope. And I suspect my sister will have her fantasies taken care of for quite some time." Luna did not visibly react, but she thrust her hips against Redheart, drawing forth a gasp.

"You don't have to watch," Luna grumbled.

"I like a good ass as much as the next person," Celestia took another sip and winked at Redheart, face still serene. "Besides, I do so enjoy reveling in a good prank." Sip.

Unexpectedly, Luna smiled a wicked little smile, though her coupling with Redheart barely slowed.

"That's good," Luna said to her sister, "I wouldn't want to miss this." Celestia raised an eyebrow, then a very slight blush appeared on her cheeks. "I knew about the potion too, you know," Luna finished.

Celestia looked at her teacup with growing horror, despite the adorable cats.

"You...told me...her favorite," Redheart managed.

"I wouldn't lie to you, you're far too pretty," Luna said, "it really is her favorite mug. But I did spike it."

Celestia stayed sitting, still rigidly proper, but now silent. Redheart looked down, and the unmistakable tent was in her pants too.

"Feel free to enjoy the show, sis," Luna winked. "If you need to go, we understand."

"Nonsense," Celestia said, "I'm fine. Unlike you I can deal with my arousal like a grown-up."

Luna rolled her eyes. "This feels pretty adult to me." She thrust her hips into Redheart, who moaned.

Redheart thought a moment, then decided she'd already come far enough.

"Y-you don't have to," she said, "let me help."

Celestia arched an eyebrow at her. "Are you sure? There's no need to pity me, I promise I'm fine."

"I don't p-pity you," Redheart gasped, "I want you."

"Both sisters at once? You are ambitious. I don't think anyone's had that since I was in college, and Luna was in high school. Isn't that right, sis?"

Luna nodded. "And it took three of them."

"I want to," Redheart said.

Celestia just grinned, and walked over. She shed her jacket before she'd even left her chair, and her blouse and bra not long after. Her breasts were as white as Redheart's own, but larger, with nipples and aureolae to scale. And, as Redheart had suspected, her hips were wider and her body fuller than her sister's. She'd look like a classic fertility goddess...except that with the new tent between her legs, she'd be the one doing the fertilizing.

She seemed to be leaving it for Redheart to reveal, and despite the heavenly distraction of Luna still pounding away inside her, she did so. The member was longer than Luna's but slightly less thick. Unlike her sister, Celestia kept a well-trimmed bush, and to Redheart's shock the multicolored hues of her hair repeated here. The long shaft was white like a classic statue, and Redheart would have sworn it glowed. And where the heads of other cocks she'd seen had been slightly darker than the surrounding skin, Celestia's was...indescribable. She might have called it grey, but somehow it was dynamic, and though she could not swear it was real, it seemed to swirl with color, like mother-of-pearl.

Either that, or she was so addled from being pounded by Luna, and so drunk on hormones and fantasy that she'd lost all touch with reality. But either way, it looked delicious and ready, and Redheart eagerly took it into her mouth. She no longer even cared about the impossibility of swallowing the load - she looked forward to Celestia's thick, hot cum dripping over her body. As she began working the shaft with her hands and the head with her lips, she decided she'd try to take it on her breasts.

As for Luna's load, she had no intention of letting that go anywhere but the obvious. She'd seen Muffins' belly swell up with Sunset's seed, and was intensely curious as to how it would feel, and intensely aroused by the idea of finding out. The sensations were crashing over her now - Luna keeping a steady rhythm into her womanhood, Celestia's sublime taste wafting down her eager throat, smooth and soothing as the tea. But one of the underrated traits of a school nurse was a certain detachment, and she could keep a small part of herself in control, observing, even as she felt the tide of her own orgasm rising.

And she determined she'd not let it wash over her until Celestia was taken care of. So even as she clenched and stroked her eager pussy on Luna's sublime cock, she went to work on Celestia's, focusing on her tongue and lips, trying to urge the vice-principal to pleasure as quickly as possible. Eagerly she lapped at the head and base of the shaft, and eagerly she took it between her tight lips, deeper and deeper, relishing the feeling. Celestia's facade cracked, just a little. Her cheeks seemed to glow red now, and her eyes were half-closed, her lips curled in a half-smile.

The time seemed to have come, and if it hadn't, Redheart was probably going to fail - she could feel her pleasure becoming nearly irresistible. She took a deep breath, and unleashed her best. Relaxing her throat, she took Celestia's long shaft to the hilt, her lips pressing against heavy alabaster balls like a kiss.

The final throw worked. She felt the balls clench against her lips, heard Celestia's surprised warning moan. She felt the heavy blast of liquid moving through the shaft as she pulled her lips back, and the first large burst surged between her lips to her eager tongue. It was warm, nearly hot, rich in a taste she adored but couldn't identify, and slightly spicy. She almost lost track of the danger, the sheer size of the load she knew was coming, and eagerly swallowed the second burst as well. Celestia pulled back against her eager lips, and that brought her to her senses. She cleared the tip just in time for the next burst to streak her lips and cheeks. It was deliciously warm, just on the comfortable side of hot, like being the perfect distance from a roaring fire. She lay back slightly and pushed the shaft slightly down, letting the rest of the massive load empty on her breasts and stomach. Each burst was like a ray of welcome sunlight falling on her flesh, but much though she was sure she'd love to watch, her eyes instead locked with Luna's, which seemed to have swelled massively at the sight of her sister unloading on Redheart's pristine flesh. Luna gasped, and Redheart closed her eyes as she felt her own resistance finally fall. Legs trembling she fell heavily on Luna's rock-hard shaft, taking it deep inside her. Even as she felt the last bursts of Celestia's cum splattering her chest, the first long rope of Luna's surged into her.

Like the sisters, the two were utterly different, but undeniably wonderful. Where Celestia's seed was like lines of liquid sunlight on her snow-white flesh, Luna's was the cool breeze of a summer night under the stars. While the pleasure Redheart felt in what was rapidly becoming the finest orgasm of her life thus far didn't fade, she found the coolness seeping into her core let her savor it. Her rational mind's detached view became both more and less distant, the pleasure seeping in but not controlling it, like the memory of joys long passed and fondly missed. She saw stars, but not spinning drunkenly before her eyes, but the calm vast galaxy looming overhead, full of secrets that promised only joy, not terror.

But this did not override the delicious, carnal knowledge that an unbearably sexy body was pumping sexual fluids into hers, in massive quantities. She felt the fluid swelling her vaginal canal, knew it was too much, that soon it would spread her wider as it flowed out of her around Luna's cock, drenching them both. But it didn't. Instead her cervix opened for it, not painfully, violently, as she knew could happen when a woman took on something too large for her. But rather she felt it open like a gate, letting in welcome visitors.

And in they came, in massive numbers. The night river of Luna's cum flooded into her, filling her whole body with the delicious coolness, save for the streaks of sunny warmth where Celestia's cum dripped on her body. She felt herself swelling with it, and it was too much. Her eyes stopped working. Her mind flooded with a starry sky, and she felt as if she were reliving all the best sensual moments of her life, from her first orgasm (under her own hands, usenet erotica on a two-tone screen) to the best ice cream she'd ever had. She probably blacked out.

She shook it off a moment later, and gathered herself. Her pussy was empty, but her belly was full. She lay on the floor of the sisters' living room, breathing heavily. Her body was streaked with Celestia's cum, and she did a double-take: rather than the white fluid she'd expected, nearly invisible against her own pure white skin, the streaks of fluid swirled like liquid rainbow, ever-shifting. Eyes wide, she looked lower. Luna's seed was dripping out of her in the form of the cosmos - an ink-black liquid swirling with stars and nebulae.

She remembered what she'd seen under her microscope, and mentally shrugged. Clearly the potions kept their strange effects, but even though her body, filled with cool and streaked with fire still, felt somehow fertile in a way it never had before, she knew the potion's own contraceptive spells would be in full effect. And this didn't even need a microscope to look nothing like human semen.

Besides, the sight of her belly swollen with Luna's cum, the feel and sight of Celestia's hot streaks all over her, left her feeling no less horny than she had before she'd brought up the subject of the potion. She looked around. Luna was lying back on the couch, eyes closed, breathing heavily, fluid-drenched cock intact. Celestia also seemed overcome - she lay not far from Redheart, serene but apparently stunned, her shaft too still rampant.

They did say it usually lasted for two loads, she thought. Well, good. I'm certainly eager for more. She was gripped with the desire to get both of the sisters' cum in her already swollen belly, to feel what night and day felt like mixing in her womb. She crawled over to Celestia and lay atop her, letting her own cum drip down on to her full breasts. She licked it off, savoring again the taste of unidentifiable spice. Celestia stirred beneath her. She slid her pussy, dripping her own hot fluids and Luna's cool, down to the other woman's wonderful shaft. She slid over it. Celestia's eyes opened and widened. Redheart pressed her ass back in one smooth stroke, spearing her eager pussy fully.

And fully it was. She felt Celestia fill her entirely, a long ray of glorious warmth that kissed, oh so gently, the gate that recently had admitted Luna's gift. She hoped it would be as willing to take her sister's, as she intended Celestia to be as deep as possible when she unloaded her second load.

Celestia seemed to have been about to say something, because her lips parted, but as Redheart's damp lips teased her still-full balls, she seemed to lose it, and instead a deep sigh issued. Redheart leaned down and kissed her, open mouth to open mouth. For a moment Celestia seemed stunned, then her tongue reached out, and danced with Redheart's as the younger woman rode her eagerly.

Finally Redheart broke the kiss, and moved her lips down, gulping down more of the delicious cum that had dripped on to Celestia's body.

"It looks like Luna likes your ass as much as the students do," Celestia said finally, and Redheart realized it was the first profanity she'd ever heard her use. She looked back at Luna, who's eyes were now wide and open, and did indeed seem to be fixed on Redheart's full white rear bouncing on her sister. She was lightly stroking her hard member, and from the easy way her hand moved, Redheart could tell it was still covered in a variety of lubricants.

"Don't just look," she said, and reached back to spread her cheeks even wider, "come fuck it." She wiggled for emphasis, and Celestia gasped at the sensation her pussy created as she did.

Luna gulped and licked her lips again, then nodded. She stood and strode over, then fell to her knees and pressed the tip gently against Redheart's pucker. Soaked as it was, it slipped in easily, but still she went slowly, careful of causing pain.

That wouldn't do. Redheart bucked up against her, leaving only Celestia's tip inside her and sinking Luna fully inside. Both sisters gasped in pleasure, and she reached back and grabbed Luna's hand, pulling her forward and keeping rear stuffed even as she fell on Celestia. She knew her orgasm was coming fast. The feeling of both sisters inside her at once was nearly unbearable in the pure physical pleasure it gave her. Luna remained cool, clear, and focusing, leaving her aware of the pleasure in a way she'd never been before, but Celestia was the warmth she loved about having a dick inside her but in perfect form. She knew her body would give in, and soon.

But what she craved was not just a normal orgasm, perfect though she had no doubt this one would be. She wanted again that feeling of enlightenment she'd felt when Luna unloaded into her, craved to know what she would experience when both sisters inseminated her at once, when their seed mingled in her womb.

And so she rode them as hard as she could, and they didn't seem to mind. At frantic pace she drove her body up and down, back and forward, both sisters sinking and rising in and out of her eager orifices. Every inch of her flesh was soaked - with the sweat and pussy juice of three women, and with Celestia's incredible prismatic cum. But still she craved it inside her. She wanted it deep in her being. Just the thought of it made her orgasm crash over her, but that only drove her harder. She screamed and kissed Celestia wildly. She reached behind her and stroked Luna's balls. She broke the kiss and howled, "give it to me!"

And they did. First Luna's river of night surged into her bowels. Medically, she knew she had no nerves there. She knew the human digestive tract was incredibly long, and it took hours for anything to work its way through the whole thing.

None of that mattered. She felt Luna's cum surging into her, night rolling in suddenly and in quantity as if she'd just turned off a camping light. It filled her with that same clear calm overlaid on her now multi-orgasmic frenzy. And she felt Celestia's cum, ejaculated into her mouth and eagerly lapped off her lover's full breasts, moving down through her innards to meet it, fire and water, night and day, rushing to meet inside her, in the place where her body made things its own.

Just before they did, Celestia exploded into her womb. Her cervix didn't even bother. The first jet of solar warmth passed right through joyfully, welcomed, leaving her nerve-rich vaginal walls painted in the warmth of a sunbeam. It eagerly surged to meet Luna's seed in the place where her body wanted to form new life.

They met at the same time. She felt fuller and fuller as the sisters pumped their magically full balls into her eager body, eager to find its capacity. She felt nameless things fill her mind. Equations and concepts she'd never seen and didn't understand, mixed with vast shapes of dark and light and a feeling of incomprehensible mass, but somehow she felt she knew them all, and was not afraid. Light filled her eyes even as they were closed, and she opened them to realize in pleasure-dulled calmness that it was because her entire body was glowing. Her breasts and belly were swollen as if pregnant, and all her white flesh had vanished, replaces with swirling, glowing patterns. Rainbows, pure warm splotches of sunlight, and deep pools of night danced on her flesh. She knew the secrets of the universe, though not in a way she could put in to words. She thought, though, she could sing them, and opened her mouth wide in joy. Three notes escaped, perfect and clear and ringing with the truth of the cosmos. Then she passed out, still quaking in orgasm.

"Oh dear," Celestia said, falling heavily again to rest against the couch. Though the cock was gone, and with it the overwhelming need to breed, she was now bone-tired, and still damnably horny. "I think that was a mistake."

Redheart no longer swirled with cosmic light, but her body still shook in orgasm, even though she was unconscious. Celestia thought it seemed to be fading, though. But she still glowed slightly, and despite her obscenely large belly, only her own clear fluids dripped from her naked pussy. Her body seemed unwilling to let a single drop of heavenly seed escape.

"You think?" Luna said. "Why didn't you stop her when she started fucking you? At least when it was just mine in there, it was coming out!"

"Why did you fill up her ass? At least if it's in her womb, her body won't try to metabolize it!"

At that, Redheart's orgasms finally stopped, and she settled, breathing easily and calmly. As the sisters watched, her belly began to shrink, though still no fluids emerged that might indicate why this was.

"You were saying?" Celestia grimaced.

"Shit," Luna sad. "Well, I guess at least we won't have a new baby demigod running around."

"No, but for all we know we might have an adult one. You know as well as I do about anti-entropy. If she's taking all that power into her body...It was just never a possibility for us before," Celestia sighed. "You know as well as I do mortal seed in us is no concern." She grinned. "Not like I don't remember the times we both knew it at once, for that matter. But this..."

"We should have known as soon as we saw how yours looked," Luna nodded back. "We should have stopped right then." She moved to kneel by their insensate lover.

"Could you even have stopped?"

"If I weren't already inside her, maybe. Maybe. I've never been so horny in my life as I was once I was inside her."

Celestia sighed. "Nor I. Maybe it's a sign this was meant to be, and will all turn out for the best. How is she?"

Luna pressed her ear to Redheart's gently heaving breast. A swirl of midnight light surrounded it briefly.

"Well, she's dreaming Deep Thoughts not even I can really decipher, so there's that. Though I think she can't either. But her body seems fine, as far as I can tell. She's not in a coma, it's not that kind of dream. She should wake up this morning, maybe early afternoon."

"Will she remember what happened?"

"Probably."

"Shit. Think we can play it off as 'those crazy potions, who knows what they do'?"

Luna shrugged. "Unless we think of something better before then, probably our best bet. I don't really want to tell her everything unless we really need to."

Celestia nodded. "I'll put her in the guest room, then."

She came back wearing a robe, and threw another to Luna.

"It was certainly nice, though," she grinned.

Luna grinned back. "I don't think I've had it that good since they had those fertility cults."

Celestia chuckled. "Maybe not even then. The penis is certainly novel. And she was so eager! It really has all been downhill since monotheism."

Luna sighed. "Yeah, but it didn't satisfy my pussy. I'm still dripping."

"Me too."

"I've got more potion..."

Celestia couldn't hide her reaction. "Are you sure your head has cleared? I don't want to think about what pumping your power directly into my body might do, or vice versa." She blushed. "Well, it would feel nice, I'm sure, but there's no way we can risk it."

Luna sighed. "You're right, of course, but I really want something inside me. Vibrator it is, I guess. Want me to bring one for you?"

"It just isn't the same," Celestia sighed. "But I suppose."

Just as Luna rose, though, the doorbell rang, despite the fact that it was now getting on towards ten, and even the summer twilight had faded into full night.

"Who could that be?" Celestia mused, rising to go to the door.

"You're going to answer in your robe?"

"At this time of night, any caller should expect it," she shrugged. "Besides, it covers everything." She opened the door, and was surprised to see Pinkie Pie standing in the pool of light that spilled out. Their recently former student's eyes were downcast, but based on her recent experiences, Celestia couldn't help but notice her skirt was very short, and her generous breasts were nearly spilling out of a very low-cut top.

"Hey vi, err, Celestia," Pinkie said. "I kind of have a problem, I hope you can help. Can I come in?"

"You realize I'm not your vice-principal anymore, right?"

"I know! But that's why I think you can help! It's really important to me."

Celestia shrugged. "Very well. I hope I can help. Luna, Pinkie's here to talk," she called out to her sister, hoping Luna had not made herself indecent.

She hadn't, and they found her sitting demurely, if only in her robe, on the couch. The room still smelled slightly of sex, but Celestia hoped Pinkie wouldn't notice.

"Now then dear, what can we do for you?" Luna said.

"Well," Pinkie seemed far more hesitant than usual, "you know basically everything that happens at the school, right?"

Both sisters nodded. "We try."

"So you know about my motto?"

"What happens in Pinkie stays in Pinkie?"

Pinkie grinned and nodded. "Right! And you know about Sunset's potion?"

They both nodded.

"Well, so when I found out about it, it was great! At first I thought I'd only be able to have sex with all the boys and gay girls before I left school. But then it turned out I had a way I could make the straight girls happy too! Either they could happen in me, or I could happen in them! The motto works both ways, you know. And I did it! Before graduation, I had sex with the whole class!"

"Did you get pregnant, Pinkie? We'll help if we can," Luna said.

"No, silly! I'm super careful about that. No, it's just, when I graduated, I realized something that made me super upset."

The sisters looked at each other in confusion. "And what would that be?" Celestia said.

"I realized I hadn't had sex with everyone who helped make my time at Canterlot High the very bestest! I still hadn't shown the teachers how much I appreciated them! Or, well, you two. So uh, now that I graduated and it's okay, I wanted to go around and give you all the chance to happen in me! Or for me to happen in you." She pulled out some bottles. "I bought some potions in case. Please can I fuck you?"

"Pinkie," Celestia said, though she certainly liked the thought, "we're a lot older than you..."

"You're still super hot though! And I'm legal! Like, even on the Internet! And it's not like I don't know what I'm getting into. Or into me."

"That is true," Luna said. "The whole senior class?"

Pinkie grinned and nodded enthusiastically. It did excellent things to her breasts. "Yep! Pleeeeease?"

"I was about to go get my vibrator...." Luna said, slowly.

"Say no more!" Pinkie uncorked one of the bottles and downed it immediately. She was wearing no panties under her short skirt, which was immediately obvious when a large pink shaft emerged from beneath it without even token interference.

"We're really doing this?" Celestia sighed.

"I am," Luna let her robe fall aside, "you can go to bed if you like."

Celestia didn't.

Author's Note

I couldn't work it into the story without a "of course you know, but", so I didn't make it fully explicit, but yes, Celesita and Luna are night and day demigods here, in case that wasn't as clear as I thought. Why they have day jobs as vice-principals is left as an exercise to the reader.

Epilogue: The Canterlot Files

Sunset Shimmer was running out of money.

Of course, in some sense she couldn't, not anymore. Her bank account was nearly empty, the last legacy of the gems she'd stolen before running away, all those years ago, finally spent. But she needn't rely on them anymore. She had friends in Equestria now. She could return. Or she could just ask for more. Twilight hardly had need of them. Not only were they worth less in Equestria, but that side's Rarity could apparently find them in vast quantities with magic.

But she didn't want to. She wanted to be a human, for real, without cheating. Unfortunately, it turned out if you weren't a real human, and so didn't have things like a social security number, it was difficult to do very much. Forget going to college, she couldn't even get a retail job. Soon she'd have to give up.

Just as she was thinking this, though, her doorbell rang.

Standing on her porch was Nurse Redheart. No, not anymore, she reminded herself. Just Redheart now. She wasn't sure what the former nurse had left to the school to do.

Whatever it was, she'd either lost all her fashion sense, or had a strange uniform. Despite the mid-July heat, she was wearing a trenchcoat and detective hat like in old movies. She looked slightly different, as well. Her face was still beautiful, if anything more so, pale and framed by the same pretty pink hair. She'd always been very white, of course, but now even in the shadow of the hat, her skin seemed to glow a little.

"Oh hey," Sunset said a bit awkwardly, unsure what to call her. "What's up uh, Ms. Redheart?"

"It's Agent Redheart now," she produced what certainly appeared to be an official FBI badge. "Can I come in, Sunset?" Sunset's heart dropped, even though Redheart was smiling in what looked like a friendly way. Sunset's mind raced, but she didn't have anything illegal in her house - she was pretty sure the potion wasn't regulated. Still, she thought about refusing - didn't they say you should?

"Uh, am I in trouble?"

"Oh! No, sorry. I just want to talk, but it's a bit private. We can go to my place if you're worried."

"Nah," Sunset said, and gestured inside. To her surprise, Redheart still kept her hat and coat as she fell into a sofa.

"Isn't that hot?" Sunset asked.

"Unbearably," Redheart sighed. "But we'll get to that in a bit. I'm here to offer you a job."

"You know I'm an illegal alien, right? Emphasis on the alien? I don't have any papers or anything."

"That doesn't matter," Redheart said. "In fact, it's why I want to hire you. I work for a special branch of the FBI here. I was originally going to go into forensics, but they'd heard about the strange things happening around here, so they offered me this instead. Well, and some other stuff happened."

"Other stuff?"

Redheart removed her hat. At first Sunset didn't know why she'd done it just then, but then she noticed two cute red horns protruding from beneath Redheart's hair. By the time she had, the other woman had shed her coat, revealing a set of red bat wings.

"Wow," Sunset said. "I only had that stuff for a little while. It's permanent?"

Redheart nodded.

"And you're not like, evil or anything?"

She shook her head. "Same as always."

"How'd that happen?"

"It's a long story. I'll tell you if you take the job."

"What's the job?"

"Like I said, we're a special branch. Lots of discretion. Our jobs are to find weird shit, and make sure it's harmless. That's it. We're allowed to kill things if we need to, but we'd rather not. My bosses know that, if they're being peaceful, 'illegals' like you are just people, sometimes useful ones. We're kind of a test. They've had a few agents like this before, but we'd be the first permanent office. We'd investigate, make sure things are okay, build a network when we can. Nothing sinister, at least if we can help it, just make sure we avoid misunderstandings and know people are safe. I need a partner, and we don't want a human." She looked back at her wings. "Or former human. I know you can keep your head in a crisis, and I know you're good at getting on with people. I think we can make a real difference."

Sunset thought.

"You don't have to answer right away, of course. I can give you a card. I need to get started soon, so I can't keep it open forever, but I'd really like to have you. I can't think of anyone better. So I can hold it for a week, maybe two."

Sunset thought some more. But honestly, there wasn't much to think about.

"I won't need it," she said, "partner."

Author's Note

Why yes, this is a sequel hook. We'll see if/when I get around to using it.