Twilight knew that keeping track of Pinkie Pie of all ponies would not be easy. Her assignment would be a difficult one. That's why she made sure to start using the tracking spell the moment she parted ways from her fellow Twilights.

As it ended up turning out, though, she needn't have worried. For once, Pinkie Pie was entirely predictable: she'd gone straight to Sugar Cube Corner, without the slightest detour or distraction. Very unlike her. Twilight made a note of it. This was a significant behavioral deviation, almost certainly caused by the potion.

One thing had certainly not deviated from baseline Pinkie behavior, though: she was fast. And with the head start Pinkie already had, she'd managed to arrive at Sugar Cube Corner long before Twilight did.

The tracking spell indicated that Pinkie Pie was in the kitchen, near the back where the biggest bakery oven was. Twilight took the opportunity to cloak herself in a simple invisibility spell before quietly opening the back door and slipping inside.

Her tracking spell had worked perfectly. There Pinkie was, bending over something about to come out of the oven. Pinkie's wide, juicy hips shook side to side, threatening to upend her skirt and show everything underneath.

How had the potion made Pinkie want to bake things? That wasn't the intended purpose at all. Twilight scribbled down another note. Could it be that Pinkie – being Pinkie after all – had an entirely different and unforeseen reaction to the potion?

Pinkie turned around, holding an enormous tier of cake between her oven mitted hands. “Oh! Hi, Twilight!”

Twilight's jaw dropped. “You can see me?” Had her magic been that reduced by splitting herself into copies? Maybe she shouldn't have done it.

“Well doy.” Pinkie laughed. “You act like I've never seen an invisibility spell before.”

“Y-you...” Twilight sputtered. “Nopony has seen an invisibility spell before – that's the whole point! You can't see it!”

She shrugged without dropping the cake. “Eh, I've seen better.”

“I'm at reduced power, okay?” Not that having more magical power at her disposal would really make a simple invisibility spell work any better, but it was a handy excuse ... something she could say without breaking her mind too much by thinking of how Pinkie – an earth pony – was able to literally see through one of the most foolproof spells known to ponykind. Focusing on that wouldn't help anyway. She had a mission to do here, and if Pinkie wasn't fooled by the invisibility spell, then maybe that was a good thing after all. “Pinkie,” she said, “what are you doing?”

“Baking.”

Twilight took a deep breath. This was going to take some patience. “And why are you baking?”

“To make a cake.”

Yes, of course, Twilight thought. How silly of her. “And why do you want a cake?”

“So I can jump out of it.”

“What?” Twilight hurried to follow Pinkie around the corner.

And that's when she saw it. When had Pinkie had the time to bake all of that? An enormous three-tiered cake sat on a low rolling tray, already decorated with pink icing all over it. As Twilight watched, her eyes bugging out, Pinkie made quick work of decorating the final layer she was holding. And, indeed, upon closer inspection, there was a hollow space inside the cake. Space enough for a mare like Pinkie. But how could she even get into it without messing up all that icing? Unless she...

She did. Holding the final tier of cake high over her head, Pinkie leapt up and neatly bounced straight into the opening in the cake. The top tier lowered itself neatly over her, completing the thing into a seamless four layer monstrosity of a cake.

Twilight came up next to the side of it. It looked very seamless. “Are you okay in there, Pinkie? Did you remember to give yourself air holes?”

“Duh,” a voice from inside the dessert said. “Sheesh, you act like I've never baked somepony into a cake before. There's air holes in the bottom.”

“Oh, okay... And, um, why are you baking yourself into a cake, again?”

“Sheesh, Twilight. Usually you're a lot quicker on the uptake.” The cake quivered and jiggled a little. “Just let me get changed and then wheel me out into the party.”

Twilight's head tilted to the side. “Party?” Given that it was Pinkie Pie, she shouldn't have been surprised to find out that there would be a party involved ... but what party?

“Right through that door.” The sound of ruffling clothes came from inside the cake. How did Pinkie have room to change clothes inside there? And had she put a change of clothes inside ahead of time, or had she just pulled it out of her mane or something? Nothing would be surprising, coming from Pinkie Pie. There wasn't any need for her to point out which door, though. There were only two doors from the bakery, and the wheeled trolley was already pointed straight toward one of them.

Twilight was about to ask more questions ... but then again, she'd never gotten very far by asking Pinkie questions. Maybe it would be better to just wait and see.

The wait actually didn't take very long, actually. It was only a moment or two before Pinkie called out, “I'm ready!” from inside the cake.

Well, okay. Twilight tucked her notepad into the waistline of her skirt and took hold of the trolley's handle instead. Thankfully, she had her magic and could use that to open the door easily on her way through.

On the other side, half a dozen young stallions looked up from where they'd been huddled around a table in Sugar Cube Corner's private dining room. All of them wore party hats. “Woah,” one said, “another cake? But we just started eating this one!”

“And how the hay is it coming in here all on its own?”

Too late, Twilight remembered she still had the invisibility spell going. Oh well. These stallions would just have to enjoy their magical cake.

“Who cares?” another said – the thickest, beefiest of the bunch. “It looks amazing! And if you book a Pinkie Pie party for your birthday, you should expect some surprises. Let's dig in!”

When the stallions rushed toward the new cake – one of them with the big cake-cutting knife in hand – Twilight was just about to spring into action and save her friend's life.

It turned out not to be necessary, though. Pinkie leapt out of the cake just before the stallions got there, sending the top layer flying. Twilight barely managed to avoid getting hit by it, which would have completely ruined her invisibility, not to mention the annoyance and the mess.

“Hello, boys!” Pinkie said cheerfully, holding her arms up and dancing side to side a little. “Who's ready to really get this party started?”

Twilight's jaw dropped. Pinkie was wearing... Well, she wasn’t wearing much of anything, really. It was bright blue ... and kind of a sling bikini? Rarity would know. Twilight sketched out a rough impression of what it looked like and made a note to ask Rarity about it later. But it was basically a couple straps of stretchy cloth that looped up from Pinkie’s ass like a sling, sent one strap over either shoulder to barely cover one big bouncy breast each, before plunging back down her slightly rounded belly to a tiny triangular patch at the bottom that was scarcely enough to cover her pussy lips.

She had to assume Pinkie had already owned this before she drank the potion. Had she ever worn it before? And on what occasion? That was all worth making more notes about for future questions.

For now, though, she had a lot to observe. Pinkie was dancing, right there in the cake, writhing her body back and forth and touching herself all over ... especially along the sides of her big pink breasts, pressing them together. The darker pink rings around her nipples were already visible at the sides since the strap of her outfit was too narrow to quite cover them, and every time she pressed her boobs together, those darker pink circles became a bit more visible.

Twilight moved around behind the stallions, trying to get a better view without inadvertently touching any of them. Not that she really needed to worry. They were so preoccupied staring at Pinkie that she probably could have knocked one completely over and they still wouldn't notice anything but Pinkie's bountiful bouncing tits.

“Who ordered the birthday stripper?” Pinkie said playfully.

The guys stared at each other – not for very long before looking at her again – and let out a collective “Uhh...”

“Trick question – I ordered me!” She let out a huge giggle that ended with a snort ... then she leapt out of the cake, landing right in front of him without so much as trailing her tail through the frosting. “Now, is somepony gonna throw some bits at me so I can take this thing off or what?”

All six stallions were immediately digging in their pockets, coming back with the jingle of bits.

“Now that's more like it!” When the stallions held out a few bits, Pinkie hooked her fingers under the straps of her outfit – plenty of room to do that between the bottom of her tits and where the strap angled down toward her chest – and she pulled the straps to either side. She didn't even bother taking their bits. Apparently, just offering was plenty for her. Or maybe she'd gotten distracted? She seemed to be watching the way her boobs bounced and jiggled just as much as any of the stallions.

Although Twilight was mostly interested in what passing up those proffered bits meant for Pinkie's psychological motivation, she did also deem it worthy to take note of Pinkie's outfit. Even when they weren't struggling to conceal her nipples, those straps were still useful. They now served to press Pinkie's tits slightly together, making sure she still had massive cleavage to show off even when she was totally exposed.

Well, not totally exposed, but she was working on that. Pinkie turned around, bending most of the way over and shaking her ass and tail at them. “A little bit more, and maybe I'll show you a real treat!”

The stallions glanced at each other for a moment, then held out the same bits again.

That seemed to be just fine by Pinkie's standards. She slid one thumb under the strap that just barely managed to hide her pussy, then stretched it off to the side, stretching it all the way out until she finally released it and let it slap back against one ass cheek, making it jiggle.

The jiggling didn't die down, either – Pinkie started moving right along with it, making her big pink ass shake for them all to the point where her cheeks clapped together.

Twilight watched, nearly as enthralled as the stallions whose shoulders she was peering over. The main difference being that she still had the wherewithal to take notes.

This went on for some time. It seemed the stallions never got tired of Pinkie's jiggles, and – Pinkie being Pinkie – she never tired of jiggling. She did eventually turn around and start shaking her boobs for them instead, gazing over them all with a slight smirk. “So ... who's the birthday boy?”

Pinkie had to already know that, Twilight was sure. Pinkie knew everypony's birthday. So why was she asking?

“Pepper Puff is,” one stallion said, pointing to a thin reddish brown stallion with a green mane nearly as unruly as Pinkie's. “He's the last of us to turn eighteen.” The stallion he indicated – Pepper Puff – blushed, his face turning more red than brown.

Pinkie strutted over to him, swinging her hips and jiggling everything as she walked. “Well, birthday boy gets a free ride – everypony else had better be ready with some bits!” She reached out and took Pepper Puff's hand. “Why don't you come over here with me? The rest of you boys can just have fun and watch.”

Twilight had to hurry out of the way to avoid being run over by the gaggle of stallions following Pinkie over to a chair next to the wall. Not standing on any ceremony, Pinkie bodily turned the boy around and pushed him toward the chair, making him fall into it.

And then she started dancing again. This time, though, it wasn't all bounces and jiggles. Of course, some of it was bounces and jiggles, but now she was also mixing in some very erotic slow writhing motions ... motions that usually came along with touching herself.

Pepper's eyes went wide when Pinkie turned around and sat down in his lap, moving her wide hips in little circles, grinding her exposed pussy lips right up against the bulge in pants.

“You likey?” Pinkie asked.

He nodded so vigorously his hair shook, which made Pinkie giggle.

“Well,” she said, “maybe your friends could chip in a little extra as a birthday present, and then I could give you even more. Wouldn't that be nice?”

Pepper nodded again, slipping his hands up to the side of Pinkie's ass.

She pushed his hands back down. “Nuh-uh-uh... Gotta say the magic word.”

“Um... Please?”

“That's not it, silly.” Pinkie got up just long enough to turn around and start grinding on him face-to-face. “Come on, don't you want to touch me? I sure want you to. I'm getting so horny rubbing on your big cock like this...”

Pepper looked up at his fellow stallions pleadingly, obviously out of his depth.

“Bits,” one of the other stallions said, plinking a coin into Pinkie's outstretched hand.

“Now that's more like it!” Pinkie leaned up closer to him and a little bit over him. Her boobs practically enveloped Pepper's face. With one hand she helped press her tits together, and with her other, she grabbed one of Pepper's wrists, drawing it upward along her thigh, up to the side of her ass.

Pepper didn't need any help figuring out what to do with his other hand. It came up as well, following much the same path, although he reached it farther, wrapping it almost all the way around Pinkie's ass cheek.

Pinkie squealed happily and giggled when Pepper squeezed her hard down there, but she soon turned around, turning her back to him once more, but this time leaning far back against him. Pepper's hands came to kind of a natural rest against Pinkie's slightly pudgy belly, rubbing her up and down either side as she kept grinding herself against his cock.

Twilight was glad she'd managed to edge closer when she managed to overhear Pinkie whispering, “Oh Pepper, could you help me with my bathing suit? I think it's slipped back into place again, and we can't have that, now can we?” The straps had indeed gone back into place by themselves as she'd walked and jiggled.

“Y-you want me to...?”

Pinkie nodded and slipped one hand underneath herself. Twilight couldn't see what Pinkie was doing with that hand, not from her angle, but she was able to make some educated guesses. She jotted down the top three most likely theories.

“You want to, don'tcha?” Pinkie said, a little louder.

“Uh-huh.” Pepper nodded even more vehemently.

Pinkie leaned up even closer to him, whispering right into his ear: “Go ahead. I won't tell if you don't.”

Tell whom? Twilight wondered. Why would they be worried about anypony finding out about it ... any pony who wasn't already in this room, at least?

That whisper seemed to work on Pepper, though. He slid his hands up either side of Pinkie's body. They trembled slightly as he brushed up along Pinkie's lower ribs, as they began tracing the straps of her ... bathing suit?

Did Pinkie really call that thing a bathing suit? Was there any beach or pool in Equestria where she could actually wear that? Twilight jotted down a few more questions to investigate later. If there was such a place, she wanted to find out about it!

Pepper, in the meantime, had finally plucked up enough courage to actually grab the straps of the thing right off of Pinkie's tits. His fingertips pressed into her softness there, making little indents as he slowly – very slowly – pulled the straps off of her again, staring down at her nipples as he did it.

Once the straps came off again, Pepper's hands stayed on Pinkie's tits. At first he just tentatively brushed his fingertips across them, taking in their big round shapes ... but he soon started touching her with his whole hand, rubbing his palm over her nipples ... and he finally progressed to outright squeezing her tits, rolling them around in his hands. Through it all, Pinkie didn't complain in the slightest. In fact, she started moving against him even more, and from the motions of her shoulder, it seemed that her hand was very busy down below.

And, of course, all the guys circled around them were egging Pepper on. “Touch her pussy!” one said. “Yeah! Spread it open for us!” another added.

For a while, Pepper just seemed too fascinated by Pinkie's plush titties. His fingers pressed into them over and over again. But eventually the things they were saying must have gotten through to him, because he slid one hand down Pinkie's body, following the line of her bathing suit strap until he came to her pussy lips.

The stallions all oohed and aahed as Pepper's fingertips pressed against Pinkie's soft pussy lips, making little indentations and pressing them to the sides. And soon, Pepper worked up the courage to touch the actual slit.

“Ooh, you're a naughty birthday boy, aren't you?” Pinkie said playfully.

Pepper kept his hand right where it was. “You're ... you're so wet.”

“Mm-hmm.” Pinkie giggled. “And it's all for you, birthday boy... If your friends are generous enough...” She looked up at the other stallions. “Whaddya say, boys? Do you guys have enough money to find out how naughty Pepper is? I sure hope so!”

The other stallions – of course – pulled out more bits as quick as they could, holding them out toward Pinkie.

Once again, Pinkie didn't actually bother taking the bits. She was a little too preoccupied with the finger that had just slipped inside her. “Ooh, he is naughty!” she said as she writhed on Pepper's lap. “Mmmm, yeah ... go a little deeper. There you go.”

Unable to help herself, Twilight leaned closer, she may have licked her lips as he watched Pepper's finger plunge in and out down between Pinkie's legs. Thankfully, nopony would be able to see her doing that.

Nopony except for Pinkie, that was. She was soon reminded of that when Pinkie looked straight up at her and said, “What do you think? Should I suck his dick, or should I let the birthday boy skip straight to his free ride?”

The stallions, obviously thinking that Pinkie was talking to them – because who else would she be talking to? – all started to chant: “Fuck her! Fuck her! Fuck her!”

Pinkie giggled. “Well, the ponies have spoken!” She twisted her head around more than should have been physically possible and kissed Pepper right on the nose. “Better take your pants off, buddy – I'm a squirter!”

The moment Pinkie hopped up off of his lap, Pepper fumbled for his pants, quickly unbuttoning and pulling them down. He hesitated for a moment with his underwear, looking nervously at the other stallions, but by then Pinkie had started dancing again, spinning and rolling her hips. She pulled the straps of her bathing suit over her shoulders and let the whole thing fall to the floor. After that, Pepper showed no more hesitation. He yanked his underwear down, pulling them completely off and letting his cock spring free, and then he stood up to kick both his pants and underwear off of his legs.

“Oooh,” Pinkie said, looking down at it with her finger on her lips, “it's even nicer than I thought!” Her eyes clearly followed it as it bounced sightly in front of her.

“Um, should I...?” Pepper asked, glancing back toward the chair.

Pinkie beamed. “Yeah! Gimme that chair, Pepper!”

“Oh, um ... okay.” Looking confused and more than a little awkward at doing so in the nude, Pepper grabbed the chair and scooted it around in front of him, toward Pinkie.

She took it in an instant, plunking it down behind her ... then she turned around and braced herself against the backrest of it, just below her chest. Luckily for her, it was a padded chair and wouldn’t cut into her too badly like that. The position she took left her rear end propped up behind her, and she swayed it side to side a little. “Oh Birthday Boy,” she said teasingly, “I have an idea about where you can put that nice cock of yours...”

He gulped, staring down at her pussy. “I do too.”

Pinkie glanced back at him and winked. “Why don't you go ahead and put it there? Then we'll find out if we're thinking of the same place.”

Pepper's hands trembled as he took hold of Pinkie's upturned ass, but that didn't stop him from squeezing and rubbing her there. Her tail twitched for him, though it was doubtful whether he really even noticed – his eyes were locked on something just below her tail, after all. Moving with exaggerated care, he lined his tip up with Pinkie's pussy lips. He edged forward so slowly, despite the excited chanting of his friends, that it seemed neither he nor Pinkie actually knew the exact moment when it touched.

Soon though, he pushed forward a little more, making her pussy lips begin to spread open around his tip. That's when Pinkie really began to moan. “Just the right spot!” she said enthusiastically – enthusiastically even by her standards. “But don't keep me waiting!”

He didn't keep her waiting. With a squeaky little gasp, he pressed himself forward. His cock slid smoothly into her wet pussy, sinking all the way down to his medial ring on the first thrust. Pinkie took care of the rest, pressing back against him to squeeze his base into her and take him all the way down to his sheath. Pepper grit his teeth and squeezed his hands hard into Pinkie's plush ass cheeks.

“F-fuck!” Pepper said, squeezing his eyes shut.

Pinkie wiggled her ass against his crotch. “Feels nice, doesn’t it?”

“How are you so tight inside?”

She laughed, starting to rock herself back and forth, bouncing on his cock. “I'll never tell!”

Raising one invisible eyebrow, Twilight jotted down another note: 'Ask Pinkie what's her secret to being so tight.'

Soon, Pepper recovered from the shock of being inside Pinkie Pie enough to actually start fucking her back. The other stallions cheered him on – one even leaned in and gave him a high-five. His eyes open again, Pepper began to grin proudly at them as he really took over the motion, pounding into Pinkie to the point where the chair started to wobble and creak.

Twilight edged closer, hoping to get a good look at where his cock was sliding in and out of her. She had to gauge Pinkie's level of arousal, after all, and what better way than to observe how wet and slick his cock was each time he pulled it out a little?

Pinkie squeaked a little every time his cock bottomed out inside her, to the point of almost making it sound like it was the chair squeaking. That didn't seem to slow her down in the slightest, though. She looked up at the other stallions, grinning widely as her tits bounced against the back of the chair. “Who wants blowies?”

Well trained by this point, all five of the other stallions immediately held out bits for her.

“Yay!” Pinkie giggled. “Show me some dicks, boys!” She held her mouth open wide, as if waiting for them to stick it right in.

Never before had Twilight seen stallions in such a hurry to get their pants off. In just a few frantic moments, they all whipped out their cocks and gathered around Pinkie, presenting her with a mismatched rainbow of horsecock for her to enjoy.

For both her and Twilight to enjoy. Because Twilight didn't see any reason not to take advantage of her invisibility and slip one hand up underneath her skirt for a little bit as she watched Pinkie enthusiastically deepthroat one cock after another, going right down the line. Such a nice set of multicolored cocks, and Pinkie was throating them like an absolute champ, swallowing them as effortlessly as she swallowed entire cakes. Each time Pepper pulled, back, she'd pull herself off of one cock; each time Pepper pressed forward, she'd plunge down on another. Twilight ventured a finger into her own slick warmth, thoroughly enjoying the show. She hadn't made any notes in a while, but that didn't matter. She could remember anything she needed to.

Pinkie seemed to be enjoying things even more. She moaned urgently around each of the five different cocks in front of her in turn, bouncing back harder and harder against Pepper's cock from behind. Each impact of his hips against her ass sent ripples spreading out through her body, and each time he pulled out, it made her moan for the next one to come. It wasn't a steady rhythm, though. The sounds she made grew steadily faster, steadily more intense. The chair was almost always leaning over on two legs now, Pepper almost pushing her over with each thrust. Only the stallions on the other side really held her back, because she always fell onto one of their cocks, rather than tumbling to the floor.

Twilight herself was starting to feel a little trembly in the knees because of what her fingers were doing under her skirt, but Pinkie beat her to it by a long shot. Between one thrust and the next, she just exploded, her whole body suddenly jerking in place. For once, she neglected to take another stallion's cock inside her mouth as Pepper pushed into her. Instead, she pressed forward, all their cocks rubbing against her face, and she squealed. Her marecum splashed against Pepper's body, drenching him and spattering all over the floor behind her.

The didn't stop Pepper, though – he kept right on thrusting. And it didn’t stop Pinkie for long, either. Even while her body still shook from her orgasm, she went back to sucking the five cocks in front of her as if desperate for their cum.

“Mmn, getting close,” one of the stallions said.

“Me ... too,” Pepper added.

Instead of replying to them, Pinkie looked straight up at Twilight. “A little help? I wanna get em' all going at the same time!”

Twilight's eyes went wide. She yanked her hand out from under her skirt. “What?” she whispered through her teeth.

“Come on!” Pinkie said. “You got me into this, so you'd better be ready to help me out.”

For a long moment, Twilight looked down and dithered about it, her hand held out and still dripping with her juices. Yes, she couldn't deny she wanted a little sample of what Pinkie was going through ... but it looked intense. And ... and what about her research? Wouldn't she be interfering with the experiment if she participated?

Pinkie pulled her current stallion's cock out of her mouth again. “Or I could just tell them...”

“Tell us what?” one stallion said.

“Who are you talking to?” another asked.

“Just talking to myself.” Pinkie stared straight up at Twilight. “Right?”

Reluctantly, Twilight nodded ... and got down on her knees. She wasn't sure quite what to do, though. Wouldn't these stallions freak out if they felt invisible hands – or an invisible mouth – on their cocks?

Pinkie had a plan for that, though. She pointed up at the two right-most stallions, the ones closest to Twilight. “I'll just give you two a handjob. But don't worry—” she winked toward Twilight “—my handies are amazing.”

When Pinkie held her hand right in front of Twilight's mouth, Twilight finally understood what she was going for... Clever. Definitely something Twilight would never have come up with herself ... but would the stallions fall for it? Only one way to find out.

Pinkie slipped her hand over the tip of the nearest cock, and Twilight dutifully began sucking him as Pinkie's hand stroked up and down. The feeling of warm horsecock in her mouth bloomed into an undeniable glowing pleasure. Yes ... she needed this.

“Wow,” that stallion said. “She wasn't kidding – this is an amazing handjob!”

Twilight smiled around his cock. If only he knew...

After that, Twilight wasn't able to keep as close of an eye on Pinkie as she would have liked. It was about as much as she could handle to keep up with Pinkie's hand as she switched back and forth between the two stallions, expertly balancing the time between them to get them both closer and closer to cumming. She only had brief moments to spare when she could watch Pinkie plunging her mouth down on the other three stallions in turn, and even shorter moments when she could risk a glance behind herself to see how red-faced and sweaty Pepper was getting as he neared his own climax inside Pinkie Pie.

Miraculously, no doubt thanks to Pinkie's heretofore undiscovered talent, all five of the stallions in front of her began to flare at about the same time, the tips of their cocks swelling huge and wide in all their various colors. Unlike Pinkie Pie, Twilight couldn't get those massive flares into her mouth, so she settled for just licking up and down the sides of their shafts just behind Pinkie's hand. Sometimes she wasn't perfect at it. Sometimes she was even licking the entirely wrong cock. If the two stallions she was trying to please noticed that, though, they didn't see fit to complain about the strange invisible tongue licking them. Maybe they thought it was just another weird Pinkie thing.

In a little boost to her own sexual ego, one of the stallions Twilight was licking actually ended up being the first to blow, shooting sticky ropes of cum mostly over Twilight's shoulder, though a little bit landed on her neck and dripped onto her blouse.

The others were close behind, all of them aiming for Pinkie's wide-open mouth as they came. Three streams of cum merged into one as they splashed against Pinkie's outstretched tongue, and she swallowed down their soupy mixture almost as fast as they could make it. When the stallion Twilight had been licking joined in, making it four spurting streams, though, Pinkie just couldn't keep up. Cum poured out of her mouth and down her jiggling chest, even though she swallowed it up as fast as she could.

Pepper was a little late to the party, but if Pinkie's pleased squeal was any hint, he was making up for it by giving her a really good cream filling. He held himself pressed firmly against Pinkie's ass, keeping his cock as deep as it could possibly go, and his tail twitched behind him with every throb of his cock.

“Mmm...” Pinkie licked her cum-coated lips and looked behind herself. “Pepper is a naughty birthday boy. Cumming inside without even asking!”

“Couldn't ... help it,” he groaned.

She laughed. “Don't worry! Your warm 'n gooey cummies are safe with me!”

Now spent, Pepper pulled his softening cock out of her pussy, releasing a little stream of leaking cum. Four of the five stallions who'd been getting sucked were hanging limp and dripping out their last drops as well ... but not the fifth.

Pinkie's prowess wasn't unlimited, and she wasn't perfect after all. Twilight wiped her mouth and made some hasty notes. Despite all of Pinkie's efforts to get all six stallions off at the same time, she'd missed one, not giving him enough stimulation before she got carried away taking the others' cum in her mouth ... and one in her pussy. It really was a good thing that this potion also acted as a contraceptive.

That last stallion just stood there, stroking himself. “So, uh... Do you do anal?”

Smiling wide, Pinkie spun the chair around and lifted her tail for him, shaking her ass side to side. “Why don't you pay a girl and find out?”

Just then, though, another stallion pointed straight down at Twilight, his eyes wide. “Woah, look! Some of my cum is just floating there!”

Twilight looked down at herself. Indeed there was a glob of white cum on her shoulder, slowly dripping down her chest. They could see her! She was going to get caught! There was only one thing to do: run!

“Hey, my cum's flying away!” All the stallions were distracted now, even more so when the door opened for the little blob of cum and it flew out.

Twilight breathed heavily once she was outside the party room, and she dispelled her invisibility. Time to get cleaned up and meet back up with the other Twilights. Pinkie Pie would have to go unobserved for the rest of this time.

Author's Note

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