Twilight x Twilight = Twilight²

by RetiredAccount

Rating: mature
Tags: Porn, Equestria Girls, Sex, Sunset Shimmer, Twilight Sparkle, Twilight Sparkle (EqG), My Little Pony: Friendship is Magic, Romance
Length: 19231

What happens when you put a human Twilight and a pony Twilight together? Science, of course, with a side dish of sexual tension.

With the combined minds of two Twilights working together, the portal between Equestria and the human world has been modified. Ponies and humans can go through without transforming, giving the alicorn princess and her counterpart a unique chance to study the interactions between human technology and magic.

Their work could revolutionize their respective scientific fields, they could bring forth a new era of harmony between their two world! If they don't blow themselves up in the process, of course.

They will also have to deal with the pesky feelings they seem to have for one another, one way or another.

Original cover image and source of inspiration by Audrarius, you can find it on his Inkbunny account (/Audrarius), his tumblr (audraria.) or Derpibooru (#1061654). Warning, explicit. Check out his Patreon if you enjoy his art!

Contains:
Chapter 1: Selfcest, pony on human action, female on female followed by futa on female, two dorks having awkward sex and SCIENCE
Chapter 2: Selfcest, pony on human action, futa on female, female on female, cum sharing, mild foot-play, titfucking, condoms, outrageously silly creampies and dominant/submissive

All characters are adults, over the legal age, and are also huge nerds.

Published 2016-03-19 16:20:01 UTC
Last updated 2016-07-03 19:37:14 UTC

For science, right?

“Twilight?”

“Yes Twilight?”

“I think we over did it.”

The alicorn and her human counterpart peeked over the overturned table, their impromptu barricade pierced with hundreds of tiny crystal shards. The two girls surveyed the destruction around the room with serene contemplation, the slow blinking of their bleary eyes betraying their exhaustion.

“Remind me…” Alicorn Twilight murmured. “… why we thought that putting a supercharged mana crystal into a blender was a good idea?” Her tired gaze fell on the black scorch mark on the opposite wall.

“I don’t know…” Human Twilight mumbled, readjusting her protective glasses lethargically. “But I think it has something to do with the liters of coffee we’ve consumed. We’ve been experimenting non-stop since…” She eyed a nearby window, the shattered glass letting the rising sun shine through. “... wait, is it morning again?”

It had now been a week since Twilight and her human twin, who had asked to be called by the moniker ‘Twily’ to avoid confusion, had managed to bypass the transformation process inherent to the portal linking their two worlds. Living beings and objects could now pass through and remain unchanged, giving them the chance to study what happened when you applied Equestrian magic to Human technology, and vice versa. They had invited Sunset to join them, since the former pony had been the first to try this idea, but she had declined with strange vehemence. The former pony seemed almost panicked at the idea of having two Twilights around her at the same time, to their great confusion.

At first they had planned to conduct their experiments in the human world, but after Twilight had been chased around first by an animal-control officer, then a bunch of scary men in black suits and finally an army of squealing little girls, they had realized that having a winged magical unicorn prance around the human world was not the best idea. Instead Twily had taken all her equipment and brought it to Equestria, along with various miscellaneous objects, like the blender currently embedded into the castle’s floor.

“We should take a break,” Twilight rubbed her eyes tiredly, her frazzled mane falling all over her face. “before we do something stupid...”

“I think we went past that point already. I mean, putting distilled dragon fire in the washing machine?” Twily nodded to a mass of melted plastic and metal in a corner. “At least we know it can’t be used as detergent.” She reached over and pushed Twilight’s hair out of her eyes, tucking it behind her ear. The gesture felt incredibly natural and familiar. She smiled affectionately. “On a scale of stupid ideas, that one was already pretty high up.”

“Maybe so, but at least it didn’t almost get us killed.” Twilight sighed, tired to the bone. “We can clean this up later…” She groaned. “It’s going to take a while.”

“Why would it take long?” Twily gingerly picked up a crystal shard with a pair of insulated metal tweezers, examining it closely. “Can’t you use your magic to collect all the pieces real quick?”

“Not if we want to avoid blowing up the whole castle into space.” The alicorn said, half serious. A small smile tugged at her lips as she saw Twily carefully put the shard down, before backing up slowly. Not for the first time, Twilight realized how cute her double was, with her messy bun and singed clothes. “Besides,” She yawned hugely, tears gathering in the corners of her eyes. “I think we really need to freshen up. Not to be rude but…” She scrunched up her muzzle. “We are starting to smell.”

“A quick shower does sound good right now.” The human girl sniffed her stained lab coat, jerking back reflexively. “Ugh, Make that a long bath…”

“Agreed.” Twilight chuckled, turning towards the door. She let her wing tenderly caress her twin’s arm, beckoning her to follow. “Come on, I’ll help you wash your back.”

Twily snorted, shrugging off her dirty lab attire. “Haha, very funny Twilight.”

*******************

“That wasn’t funny…” Twily grumbled.

She and Twilight had moved to the library, the human choosing to sulk in a corner. They were fresh out of their warm baths, where Twily had discovered a very important fact about her twin: the alicorn was not shy about sharing a bathroom with others, quite the opposite actually, and she was very insistent when she got an idea in her head. Bordering on being pushy.

“Oh come on!” Twilight whined, fluttering above the pouty human. “Social bathing is a very important component of bonding with a friend, I do it all the time with the girls!” She hovered closer, trying to look Twily in the eyes, but she kept avoiding her gaze. “I thought you would like it! I sure do…”

“Did you really think I would enjoy being stripped naked, getting dumped into a giant jacuzzi and having someone else wash me?” Twily deadpanned, glaring at the wall.

“Well yes, that sounds lovely.” Twilight answered earnestly. “And I know of at least one human culture that practices communal bathing, so I didn’t think you would mind…”

“That magic of yours went everywhere Twilight, everywhere!”

“I was being thorough!” Twilight defended herself, blushing slightly.

“Oh, that you were.” Twily grumbled. “Especially when it came to my chest.”

“I… I don’t see what you are…”

“You kept playing my breasts Twilight.” The human shot her double an accusing glare. “There’s a difference between washing and groping.”

“No, I… I would never…”

“I saw you drooling over my boobs.” Twily narrowed her eyes. “Literally drooling.”

Twilight gulped, then she inclined her head in admission. “Okay, maybe I was a little grabby.” She fidgeted with her hooves. “But you sounded like you were enjoying it… Why didn’t you tell me to stop?” She watched Twily’s cheeks go crimson, and she knew she had struck a chord. “… Did you want me to stop?”

Twily chewed on her lips, trying to understand her own feelings. Working with the alicorn had been a refreshing change of pace; never before had she worked with someone so like minded, someone who had the same thirst for knowledge, someone so like her. Which was a given, seeing as they were the same person, in a parallel universe kind of sense. Since she had crossed over to Equestria a few days ago, she had had to fight strange urges, pushing her to put her hand through her twin’s mane, caress her neck, scratch her ears… She shook her head, trying to make sense of her racing heart.

“No… No I didn’t want you to stop.” Twily exhaled, letting her head fall into her hands. “And that’s the problem.”

“What do you mean?” Twilight landed next to her twin, draping her wing over Twily’s slumped shoulders. “What’s wrong?”

“This.” Twily gestured to them both. “Us.” She ran her hand into Twilight’s feathers, marveling at their softness. “This is not normal.”

“You mean you also feel…” Twilight squirmed, trying to find the best words. “… attracted to me?”

“Yes. But the question is: why?” The human gently stepped out of the feathery embrace. “What is this reaction? Love at first sight? Narcissism? Some strange variant of the Oedipus complex?” Twily started to pace back and forth. “It started when I first saw you in your human form…”

“And for me since you first went through and I saw you in your unicorn body.” Twilight added, watching her with a thoughtful expression. “Do you think this is a…”

“Normal psychosomatic reaction to meeting your own self? Maybe. But then it would not explain why…”

“Twins don’t feel that way?” The alicorn tapped her chin, humming. “Well, twins are brought up like sisters, while we only now found each other. Also the DNA tests for my human form demonstrated that we are…”

“Completely identical on a genetic level, while we differ in appearance, which is not the case for twins.” Twily nodded, chewing on her lips. “We have the same genotype, different phenotypes, slightly distinctive personalities because we…”

“Come from divergent backgrounds, meaning that we are the same, yet different. Most books about romance say that if opposites attract, relationship between people who differ in everything do not last…”

“While people who share as many common points as we do are defined as…”

“Souls mates.” They both said at the same time.

Twily stopped in her tracks, then turned to look at her double. Twilight stared at her with wide eyes, a rosy glint coloring her cheeks. They looked away in unison, embarrassed, casting furtive glances at each other that were somehow always synchronized. After a just few minutes of awkward silence Twily seemed to be on the verge of bolting out of the room, completely flustered. She had taken a first step towards the door when Twilight shook her head, groaning loudly.

“Okay, we are being silly.” The alicorn declared, startling her twin. “There is no way a relationship could work between us; just think about our families’ reactions.” They both winced. “Shining would have an aneurysm when he finds out his overprotective brotherly outrage will be directed…”

“At himself.” Twily snickered despite her nervousness. Twilight giggled in response, the tension fleeing the room as they both shared a heartfelt laughter at the expense of their brothers. “Yeah, if we think rationally about this it’s pretty simple, it’s not meant to be. We just…”

“Keep on being just friends and we accept it will never happen.” Twilight said with finality.

“Sounds good.” Twily nodded with a large relieved smile.

They shared a complicit look, happy to have resolved the problem so quickly. Everything was so easy, once you applied logic and common sense. They held each other’s gaze for a few seconds, then their faces exploded into deep blushes. This time they did not avert their eyes, making their cheeks burn even more. Twilight gulped, her ears twitching madly.

“Though we still need to do something about this sexual tension,” Twilight mumbled, her tail wagging energetically. “if we want to get anything done.”

“Yeah, this is very distracting…” Twily whimpered, her thighs pressed together. “What should we do?”

“The most obvious answer would be to… Hmmm… Relieve our… frustrations.” Twilight’s wings were starting to stiffen, but she was too distracted to notice. “Self gratification is the most indicated solution in this situation I would think.” She turned to leave, her tail tucked between her legs to hide her arousal. “I have a few items I can lend you to help you… get the job done. Then we can go back to experimenting.”

“Hmmm…” Twily shuffled her feet, wringing her hands together. “Twilight?”

“Yes Twilight?” The alicorn stopped, her flanks twitching.

“… We are the same person, correct?”

“In a sense, yes. Why?”

“… If we had… intercourse.” Twily bit her lip, squirming cutely. “Wouldn’t that be considered masturbation too?”

“Uh…” Twilight’s mind went blank, her head swimming as she took in Twily’s meaning. “Do you mean you want us to…”

“Just to clear our heads!” Twily rushed to add, her blush going nuclear. “I think acting on our natural urges might be the best way to get rid of any further… distracting thoughts.”

“You might be right.” Twilight nodded robotically. “Yes. That’s obviously the most efficient way.” She shot her twin a manic look. “For science, right?”

“For science.” Twily agreed.

“… My room?”

“… Okay…”

*******************

Twilight could feel her insides twisting in worry and anticipation. Thinking back, she could not fathom how she had ended up in this situation: lying on her bed, legs tucked under her, waiting for her interdimensional twin to come out of the bathroom so they could... fool around.

She shook her head, but her mind kept going back to Twily. She thought about the human’s slender frame, her delicate nose, her lovely plump breasts… Twilight felt her tail thrash widely behind her, an embarrassing wetness starting to run between her thighs. Just when she was starting to wonder what was keeping Twily so long, the bathroom door finally clicked open, slowly drawing back to reveal a very fidgety human.

Twily had her arms crossed in front of her chest, as if she was physically holding herself together. She was completely naked, save from one piece of clothing: her lab coat. She whimpered, hesitated at the door, almost went back inside the bathroom, then finally stepped towards the bed. The quick pitter patter of her bare feet made Twilight’s ears twitch, the girl crossing the room hurriedly, like she was afraid she would lose her confidence if she waited too long. She climbed onto the bed next to the alicorn clumsily, almost falling over since she kept one of her arms over her chest. She finally settled down, her breath hurried, sitting ramrod on her heels, one hand placed over her pubis.

“So…” Twilight started, her voice comically high-pitched. She cleared her throat, trying to keep herself from staring at Twily’s breasts. She failed. “Here we are…” She gulped heavily. “If you don’t mind me asking, why the lab coat?”

“I dunno…” Twily mumbled, playing with the hem of her shirt. “I guess I just feel naked without it…”

“Hmmm…” Twilight’s eyes ran over her exposed body, lingering on her cute belly button and the curves of her boobs. She felt the fire in her belly rise to new heights. “You do know that…”

“Yes, I know I’m mostly naked anyway!” Twily snapped testily. “It’s a placebo effect, okay?”

“All right, all right.” Twilight smiled, finding her pouty embarrassment very cute. “But you do know that in Equestria…”

“Yes, yes, everyone is always naked, yadiyada.” Twily grumbled. “Of course the one parallel reality to converge with mine would be inhabited by nudists.”

“Though it’s interesting to note that the portal gave you clothes when you came over as a pony.” Twilight said, slowly crawling closer, licking her lips. “Maybe your lab coat is really a part of you.”

“Great.” Twily blushed, squirming away from the approaching alicorn. “Maybe Albert Einstein is my spirit animal or something…”

“Maybe…” Twilight breathed hotly, leaning forward with a sultry gaze.

“Actually it would be interesting to experiment with the mirrors perception on subjects personalities, maybe we should… *MFFT*!”

Twily’s plans were cut short, as Twilight pressed her lips to hers, silencing her manic ranting. At first the girl tensed, half tempted to push her away, but soon enough she completely melted into the kiss. She closed her eyes and responded in kind, leaning into Twilight as well. She slowly took her hands away, her movements jerky and unsure, exposing herself fully. She reached forward and tenderly caressed Twilight’s cheeks, marveling at the softness of her fur. She squeaked when the alicorn’s magic rippled on her skin, but she didn’t jerk away. She wanted this, and this time she wouldn’t deny her feelings.

Twilight hummed happily as she deepened the kiss, going from a chaste peck between friends to a passionate lover’s embrace. She let her magic travel down Twily’s neck, feeling the wild pulse of her heartbeat. Her aura then journeyed lower across her collar bone, before it finally reached the focal point of her affections. Her tail flagged high as she took hold of Twily’s gorgeous breasts, a low growl of satisfaction escaping her throat as she began to play with them. As far as Twilight was concerned, they were perfect: not too small, not too big. The analytical part of her mind had already concluded that they were at least D cup size, her extensive “research” on human’s boobs coming very handy.

A high-pitched moan escaped Twily’s lips as she felt the alicorn knead her breasts, more forceful than she had been in the bath, but still very careful not to hurt her. The magical grasp squeezed and teased, taking care to softly pinch her nipples when they hardened. Twily was sure that no hands could compare to this, even if she had never been groped like this before. The closest experience she had was Lemon Zest’s sometimes very intimate teasing, but that was always more awkward than pleasurable. Panting hard into Twilight’s mouth, she reached for the alicorn’s wings, her fingers brushing the stiff appendage from the base to its extremity. Twily felt her partner quiver at her touch, her hands finding a loose feather near the base. She smiled and pulled on it.

Twilight suddenly tackled the surprised human girl, pushing her back into the bed. The alicorn panted hard, her cheeks flushed, as she loomed over a meek Twily. A string of saliva still linked their lips, but she wanted more than just a kiss. Twilight leaned down with a hungry growl, opening her mouth. Twily covered her mouth to avoid moaning out loud as the alicorn took one of her breasts into her muzzle, then began to suck noisily. The messy suckling made the human squirm, but Twilight didn’t seem to mind. She just focused on Twily’s generous mounds, sucking on one while she kneaded the other with her magic.

With a loud *pop* Twilight released the tit she was suckling, leaving Twily’s areola glistening with saliva, then she leaned down to gobble the other. The human mumbled, spurring the alicorn on, while her hands snaked down her skin, sliding between her own thighs. Twily found her nethers dripping with arousal, her slit slick with her juices. She bit her lip as she pressed her fingers into her pussy, her index rubbing insistently on her clit.

Before long Twilight’s ears perked at the shliking sound coming from under her. Reluctantly, she stopped her insistent sucking and looked at Twily’s hands. Smiling, she slowly crept back, leaving a trail of kisses over the girl’s stomach. Twily’s heart was beating faster with every little kiss, her belly fluttering with every peck, the alicorn lovingly continuing her journey down. After a few more kisses, Twilight’s lips came back slick with arousal, her tongue darting out to sample Twily’s taste. She hummed in appreciation, then dove between the human’s legs.

She was surprised to find that Twily’s nethers were bare, not a hint of hairs in sight. She knew thanks to her “research” that human females usually sported hairs down there, so she shot her lover a curious glance, one eyebrow raised in question. Twily blushed fiercely and mumbled something about “hygiene” and “peer pressure”, then she hid her face behind her hands, her fingers still dribbling with her own arousal. Chuckling, Twilight shook her head, then dove back down.

Twilight allowed herself a few seconds to compare a human female with a mare’s. She drooled at the sight of Twily’s narrow slit, her pink folds much more appealing than a mare’s, in her honest opinion. Twilight licked her lips as she saw Twily’s clit quiver, completely exposed, in contrast to a pony’s that would be hidden until they winked. She was about to take more notes, when she heard Twily whimper, desperate for attention. Twilight swallowed thickly, intent on not teasing her lover anymore.

Twily jumped at the first touch, Twilight’s tongue going across her slit in one long, messy lick. The alicorn finished with a flourish, the tip of her tongue flicking Twily’s love button, sending a jolt of pleasure up her spine. The poor human girl panted, anxious for Twilight to get started, the alicorn taking the time to savor her nectar. Twily opened her mouth to beg for her to stop teasing her, but instead she gave a high-pitched moan as her lover suddenly pressed her muzzle into her folds.

The room was filled with the sounds of wet slurping and desperate gasps, Twilight lapping up Twily’s messy pussy, each licks ending with an insistent teasing of her clit. The human could only writhe in ecstasy, her hands grasping at the covers as her whole body tensed and quivered. She could feel her pleasure building up in her belly, each lick making her release grow nearer. Twilight felt her folds swell, her feminine juices flowing more than ever. Smirking, the alicorn stopped her long, teasing licks and pressed her lips around Twily’s clit. Her horn flared, her magic pooling around her entrance, then she pushed it inside.

A loud cry of pleasure echoed around the room, Twily squirming madly as her little nub was assaulted by a series of quick slobbering licks, while a warm magical aura rushed into her pussy. Twilight’s magic pulsed inside her, slithered her walls, looking for her most pleasurable spots. Soon enough Twily was nothing but a panting mess, her eyes glazed as she felt her pussy getting assaulted by all sides. She felt her climax rush to meet her, felt the tingling at the base of her spine, her internal walls contracting around Twilight’s magic. Her breath reached a fevered pitch, her face completely flushed, she was almost there. She was on the verge of cumming when Twilight found a particularly pleasurable spot in her pussy, the alicorn concentrating all her magic around it while she sucked on her love button.

Twily inhaled sharply, her eyes going wide. Her whole body seized, her hands squeezing the covers for dear life. She knew she was cumming just before it crashed into her mind, making everything go white. Twilight had to concentrate her magic as it was pressed from all sides, Twily’s pussy clamping down on it in quick successive contractions. She stopped teasing her clit when the pleasure seemed to become almost painful for her lover, and she looked into her crazed eyes with unabashed curiosity. Twily kept on cumming, her quiet orgasm making her gasp for air, her breasts jiggling in a most appealing way. Twilight licked her lips, she couldn’t resist for long.

After an eternity of pure bliss, Twily slowly came down from her orgasm. She took a long inhale, her breath catching in her throat, spots flashing before her eyes. She writhed in pleasure when the magic in her pussy kept on massaging her insides, her body rocked by a series of mini orgasms, the aftershocks unrelenting. When she finally managed to regain her senses, Twily was a mess, sweat running down her body. She quirked an eyebrow when she felt someone suckling on her breasts, she didn’t have to wonder long to know who it was. She slowly propped herself on her elbows, looking at her lover with an exasperated smile.

“You really like breasts, don’t you?” Twily asked rhetorically, eyeing the alicorn sucking on her boob.

“Mmhm.” Twilight mumbled, her mouth full. She let go of Twily’s tit just long enough to add, “You wouldn’t believe how many magazines I’ve been storing under my bed since we tweaked the portal.” She then resumed her suckling, humming in happiness.

“I guess that’s something new to a pony, uh?” Twily slowly sat up, shuddering when her puffy slit rubbed on the covers. Twilight grumbled when Twily’s boob slipped out of her mouth, but she begrudgingly helped the girl right herself, the magic inside her dissipating. “That was…”

“Good?” Twilight said hopefully, embracing her lover with a wing.

“I’ll say.” Twily pushed her glasses back in place, her fingers still trembling. “If I knew intercourse felt so good, I would have pursued it much sooner…”

“Wait, this was your first time?” Twilight asked, eyes wide.

“Well yes…” Twily shot her twin a confused stare. “Wait, it wasn’t yours?”

“Hmmm… no.” Twilight fidgeted self consciously.

“… Was it with one of the girls?”

“Yes.” Twilight nodded, her cheeks coloring. “I was in a pretty bad spot after my coronation, she came to me wanting to help me cheer up, we were in estrus, one thing led to another…” She looked away, towards the window. “We did it a few times since then, nothing really serious, but she wants to keep it between us.”

“Interesting.” Twily leaned into Twilight’s sides, snuggling into her fur. “I didn’t think any of them would be interested in girls.”

“Actually…” Twilight licked her lips nervously. “She was straight.”

“… Uh?” Twily jerked back, confused. “But then how did you two…”

“Let’s just say that I devised a spell that can… take care of that little issue.”

“Oh? Oh… OOOH!” Twily felt the alicorn’s wing tighten its grip on her, like she was afraid she would try to bolt. “Hmmm… So, it’s like a rule 63 spell?”

“A what?”

“It’s an internet thing… You know the information superhighway… Ah, forget it.” Twily looked into Twilight’s eyes, her mind rebelling against what she was about to ask. “So… does it turn you into a man?”

“A stallion, yes.” Twilight nodded, glad her lover wasn’t disgusted by her misuse of magic. “Though I first created that spell to only alter some parts of your body, like your vocal cords. Very useful.”

“You don’t say.” Twily remained quiet for a few seconds, wondering if she would have the courage to say it, then she took the plunge. “Can you show me?”

“You want me to change my voice?”

“No no, I was thinking more about… Down there.”

Twilight froze, wondering if she had heard right. She slowly turned to look at her twin, perplexed. “Just to be clear, you want me to change my mare parts into a stallionhood, yes?” Twily nodded, blushing cutely. “Oh, okay, that would have been awkward if I had misunderstood…”

Twilight rambled some more, her horn shining brightly. She went over the spell, made sure everything was perfect down to the last detail, then she unleashed her magic. Twily covered her face with her arm, flinching back from the burst of energy. The glare quickly faded, leaving the human blinking out spots of lights. She rubbed her eyes, feeling Twilight carefully crawl away from her. When she manage to regain her vision she found the alicorn facing away from her, her head leaning down to look at her groin.

“Did it work?” Twily asked, almost hoping it did not.

“Yes… But I think I over did it a little…” She grumbled under her breath. “That will teach me to cast a spell while I’m aroused…”

“Let me see.” Twily was on her knees, trying to look over the alicorn’s shoulders. “Come on, I’ve never seen one in real life, I’m curious!”

“Okay, okay.”

Twilight shuffled awkwardly, trying to turn without exposing herself. Twily huffed, too impatient to wait, the she decided to give Twilight a dose of her own medicine. The human grunted as she suddenly pushed Twilight over, making the alicorn fall on her back with a yelp. Twilight’s head landed on her big red pillow, her wings flaring open under her, her legs spread eagle. It gave Twily a good view of her new equipment, the girl inhaling in shock.

Twilight’s purple horse cock was enormous, it was as long as her forearm and maybe twice as large. Twily’s eyes traveled all over its length, taking note of the big throbbing veins crossing its surface, the underside bulging with a protruding seminal tube that made it even more girthy. Looking down, she could see Twilight’s balls resting on the bed, the heavy looking orbs the size of oranges. Her shaft emerged from an engorged medial ring, the equine rod crowned with a big flared head, the rounded glans possessing a jutting seminal hole, made to deposit its seed directly into a mare’s womb.

Twily gulped when she realized that she would be the mare in this case, the sheer size of Twilight’s shaft giving her shivers down her spine. Twilight watched her reactions carefully, wondering if it was too much for the human girl. Even a pony would be intimidated by the monster she had given herself, so she wouldn’t blame Twily for backing out. Unexpectedly the human girl pushed her glasses back up, then started to come closer. Twily reached for the enormous cock with a trembling hand, her breath catching in her throat when her fingers brushed against its veiny surface. She hesitated for a few seconds, then finally took it between in her hand.

She couldn’t even wrap her fingers around it, she had to use her second hand to fully grasp it. The girthy shaft throbbed at her touch, the veins bulging out obscenely. Twily chewed on her lips as she gave an experimental pump, a soft squeal of terror escaping her lips as Twilight’s cock jerked powerfully between her fingers, the head flaring wider than she thought possible. Breathing hard she pumped down, until her fingers brushed against the soft medial ring, then she slowly made the journey to the top. She shuddered at every bump, every vein pulsing with need, begging for a more intimate touch. She stopped when she reached Twilight’s flare, looking with wide eyes as her glans began to ooze with arousal, dollops of precum leaking from her urethra.

The smell hit her like a ton of bricks, the pungent animal musk assaulting her senses. She should have been disgusted, but for whatever reason the stallion scent made her mouth water, her nostrils flaring as she inhaled more. She let one of her hands stray south, the other teasing Twilight’s flare, hoping to coax more precum out of her. The alicorn groaned happily when Twily carefully cupped her balls, the human hefting the heavy orbs, weighting them. Twilight’s horn ignited, her magic naturally gripping her lover’s tits, drool dripping from the corners of her mouth.

Twily kept on playing with the alicorn’s balls, feeling them quiver in her grasp, the orbs quickly filling up with seed. She kneaded them in the same way that Twilight was milking her tits, her other hand still rubbing her glans. Moaning, Twilight gave a particularly forceful squeeze, her eyes fluttering when Twily gave her balls the same treatment. Her shaft throbbed, a spray of musky precum escaping her cock, before landing with a wet splat on Twily’s lips. The human jerked back, surprised, but she didn’t stop her ball fondling. Instead, she slowly slipped her tongue out, licking her lips with low hums of appreciation. Twilight felt her heart rate skyrocket as she witnessed the sensual display, her cock throbbing with need. When the human smacked her lips, clearly enjoying her taste, Twilight couldn’t help herself.

The alicorn quickly sat up to press her lips on her twin’s glazed mouth, her tongue darting out to sample her own precum. Twily immediately responded to the heated kiss, her own tongue slithering into Twilight’s mouth, coiling around the alicorn’s. They both moaned in desire, leaning into one another, Twilight’s cock pressing against her lover’s belly. Twily felt the alicorn’s precum oozing on her pubis, sending her insides burning with need. She wanted more, she wanted Twilight inside her, she needed it. She broke the kiss, pressing her hands into the alicorn’s chest when she whined and leaned forward to keep it going.

“Twilight…” The human whispered hotly, her breath short. “I want it…” She pressed her hand between her thighs, trying to satisfy the fire burning in her belly. “Please…”

Twilight nodded eagerly, her cock throbbing in anticipation. She pushed the human onto her back, stepping over her prone body carefully. Twily was panting desperately, her heart beating against her chest as the alicorn loomed over her once more, giving the princess a dominating aura. Twilight snorted, drew back her hips and… humped into thin air.

“Uuh…” Twilight looked under her. Her cock was hovering above Twily’s belly, leaking all over it, too high to reach her goal. “What if I…” Twilight hunched her hips, trying to align herself. It was far from comfortable.

“What?” Twily gasped impatiently. “What are you waiting for?”

“I can’t seem to…” Twilight shuffled her hooves, arching her back, until a loud crack was heard. “Horseapples, my spine!” She winced. “Nope, not flexible enough.”

“… Wow, I know books say that your first times are always awkward, but this…”

“Shush.” Twilight gritted her teeth, her hips jerking in vain. “Could you just… I don’t know, get on all fours?”

“Oh…” Twily blushed crimson. “Doggy style?”

“No, pony style.” Twilight tilted her head. “What do dogs have to do with this?”

“Never mind…”

They shuffled around, grunting in discomfort, until Twily was on her knees, her cheeks burning in embarrassment. She squealed when Twilight heaved her barrel over her rump, the alicorn shuffling up her back, her hooves taking hold of her sides. Twilight snorted and pushed her bulk over her mate, trying to align herself like she would with another pony.

“Wait!” Twily whimpered, her arms almost buckling under the weight. “Stop!”

“Stop what?” Twilight groaned, her flare brushing against Twily’s dripping nethers, resisting the urge to thrust. “Mounting you?”

“Don’t call it that!” Twily felt like her face was moments away from bursting into flames. “It sounds so… bestial!” Her arms quivered, almost giving out. “Let’s try something else.”

“Okay…”

“Hmmm what if I… No, that won’t work…”

“What about…”

“Ouch! You’re stepping on my foot. Let me…”

“Nonono, it doesn’t bend that way! Here, just put it like this…”

“Wrong hole, wrong hole!”

After a few minutes of clumsy squirming and a whole lot of blushing, they finally found a position they could work with. Twilight was lying with her back against the headboard of her bed, while Twily sat on her lap, one arm hooked behind the alicorn’s neck. Twily had called it a reverse cowgirl variation, to Twilight’s great confusion.

“Okay, that’s better.” Twily whispered, her eyes riveted to the big purple cock throbbing between her thighs, the veiny shaft pulsing against her pussy with Twilight’s every heartbeat. “Oh gosh… It’s so big…”

“Don’t worry.” Twilight panted, very much aware that her cheek was pressed against Twily’s breast. She hugged Twily from behind, holding her close, almost possessively. “Next time I won’t make it as big.”

“Next time?” Twily squeaked. “What next time? We’re only doing this so we can go back to experimenting!”

“We can do both at the same time…” Twilight rubbed her head against her lover’s tit, purring like a kitten. “Hmmm, so soft…”

“I can’t believe this…” Twily grumbled, her eyes following the trickles of precum oozing from Twilight’s tip. “And I can’t believe I’m actually not against that idea.”

Twilight hummed affectionately, still nuzzling Twily’s breast. She carefully gripped the human tighter, holding her in place as she jerked her hips, rubbing her shaft over Twily’s folds. Twily bit her lips as the alicorn’s cock grinded against her clit, the still sensitive nub completely exposed. She felt the fire in her belly roar in hunger, begging to be quenched. She resisted for a few more strokes, her own juices making Twilight’s cock glisten, then it was too much for her.

Twily took her courage in both hands, gave the alicorn’s horse-cock one last fearful look, then she started to move her hips. Very carefully, she drew back and aligned her entrance with Twilight’s pole, her panicky eyes betraying her nervosity. It was much bigger than any of the sex toys she had acquired (and sometimes created) and the twitching only made it more intimidating. Yet something told her that if she didn’t at least try to take it, she would go crazy from lust. After one last moment of hesitation, she pushed her hips back down, pressing Twilight’s large flare against her little slit.

Twilight’s cock slowly parted Twily’s folds, the alicorn’s tip sinking inside with great difficulty. The human girl was almost too tight, the flare almost too wide, the shaft arching under the pressure until it suddenly popped inside. Twilight groaned in pleasure as she felt her tip enveloped in warmth, Twily’s velvety walls welcoming her home, convulsing around her cock. She had to hold back from thrusting right away, her hooves quivering as she lovingly held her twin, her mate. A strong burst of precum spurted from her flare at that thought, helping her cock glide deeper inside.

Twily had her eyes closed, wincing slightly. It was a stretch to say the least, but it was far from being too painful to be enjoyable. Feeling the heartbeat of her lover was a new experience, her sensitive walls registering every pulse, every throb. With a grunt she pushed down jerkily, impatient to be filled. Barely half of Twilight’s cock had sank into her when she suddenly felt the alicorn’s flare bump against her depths, sending a jolt of pleasure into them both. Twily groaned, her teeth holding her lips, the sensation of fullness giving her a big satisfied smile. This was what she had been needing these past few days.

Twilight for her part moaned out loud, her tongue lolling out of her mouth in a shameless display of ecstasy. She couldn’t stop her hips from humping weakly, trying to sink her cock deeper, but Twily rose with her cock, stuffed to the brim. She could feel her mate’s quivering folds against her shaft, far from her base or even her medial ring, her flare crammed against her deepest barrier. The alicorn’s eyes rolled back as she felt the tip of her cock kiss Twily’s cervix, smearing precum all over it. Snorting in excitement she grasped Twily harder, then drew back her hips.

Twily squealed when the first thrust rocked her body, then with the second, and the third. Every time Twilight pulled out, her flare scraped along her walls, making her legs quiver. Then when the alicorn humped back her whole body quaked from the impact, leaving her dazed. Twily quickly realized that her lover’s thrusts were becoming stronger each time, her glasses slipping down her nose as she was jostled around, and she started to respond in kind.

The pair were lost in their frenzied mating, Twilight thrusting up while Twily slammed her hips down, meeting the alicorn’s thrusts. They were perfectly synchronized, their bodies moving as one, mixed fluids running all over their thighs. A particularly rough thrust made Twily tense up, her walls clamping down with surprising force. The human girl yelped, almost collapsing onto her lover, making Twilight stop her pounding. The alicorn was breathing hard, her hips quivering from the need to keep going, but she kept her animal instincts at bay.

“You okay?” Twilight panted, rubbing her cheek on Twily’s breast. “Was that too much?”

“N… no.” Twily managed to gasp. “’s okay…”

“… Can I go faster?”

“… Yes.” Twily slammed her ass down, eliciting a grunt from the alicorn. “Give me more… AH!”

The human girl had not even finished talking before Twilight was already hammering into her, a feral glint in her eyes. The wet sounds from the alicorn’s cock plunging into Twily’s dripping honey pot filled the room, before echoing around the empty halls of the castle. The human’s pussy rippled around the huge stallionhood, her folds hugging Twilight’s shaft with every thrust.

Her glasses askew from the pounding, Twily hugged the alicorn’s head, holding on to her sanity. She didn’t feel any pain now, only pure bliss, her belly radiating pleasure everytime she was filled. Her pussy was an oozing mess, precum and feminine arousal making it easy for Twilight to hump into her and press her flare against her depths. She whimpered when the alicorn seemed to become enraged with lust, the thrusts reaching a fevered pitch, her breasts jiggling from the continuous hammering.

Twilight could feel her balls rumbling, the heavy orbs churning with seed, ready to be deposited into her mate. She rammed her cock into her lover harder and harder, her new brutal pace making Twily give out several high-pitched yelps. Twilight wanted nothing more than to spill her load, to show her twin just how much she loved her, to make the two of them whole.

Twily was lost in a sea of pleasure when she realized that Twilight’s thrusts were becoming erratic, her forceful humps losing their pace to become more powerful. The alicorn rammed her cock into her harder than before, and Twily suddenly felt something change. She could feel the flare inside her expanding even more than before, pushing her walls apart. She could also feel Twilight’s shaft throbbing ominously, stretching her walls even more.

She knew what that meant.

“Tw… Twilight…” She panted, her glasses almost slipping from her nose from another powerful thrust. “Pull… pull ou…”

The rest of her plea was lost to a deep moan of pleasure, the alicorn using her magic to rub her clit as she rammed into her with desperate intensity. Twilight was too focused on her task of pleasing and claiming her mate to hear Twily’s words, her balls already constricting to deliver their load.

“I’m…” Twilight gasped, thrusting widely. “I’m almost…”

“Out… outsi…” Twily tried again, another orgasm quickly building in her belly. “Outside…”

“Wh… Why?” Twilight drooled lustily. “Different species… ‘s okay…”

“Are… are you sure?” Twily asked fearfully. She noted that Twilight wasn’t answering her, the alicorn too busy reaching her climax. “Twilight!”

“Dunno… magic… human… crossbreeding could be…” Twilight mumbled, almost hesitant. She stilled her manic trusting for a second, but her hips were widely humping in the next instant. “I… I can’t stop…”

“What do you mean you can’t stop?!” Twily tried to extricate herself from the alicorn’s grasp, but Twilight’s hooves held her in place, her cock swelling dangerously. “Twilight!”

“I can’t… My body won’t stop…” Twilight’s eyes were unfocused, desire clouding her mind. Her flare suddenly bulged to obscene proportions, her whole shaft tensing. “Oh Celestia…”

“Wait wait don’t…”

Twilight cried out as she felt her release burst from her overfilled balls, the surge rushing up the length of her cock in one mighty jerk. Her flare was firmly lodged against Twily’s cervix, trying its best to pry it open, her cock hole pressed into the opening. She ground herself deeper, desperate to satisfy her bestial urges, her magic still teasing Twily’s clit. Twily tried to protest, but it was too late.

Spurts of heavy spunk blasted against Twily’s depths, making her eyes go wide. Her body seized as she felt the dangerous warmth spreading in her pussy, the alicorn spilling more and more into her. Twilight nickered in satisfaction, her magic suddenly tweaking Twily’s clit more forcefully. The human girl instantly came, her previous orgasm coming back with a vengeance.

Twilight kept on cumming inside her convulsing mate, holding her in place to make sure she didn’t spill any of her precious spunk. To her great frustration her flare could not contain it all, trickles of sticky cum already running down her shaft, but she persevered, hoping to gain access to her innermost chamber. After a few moments of struggle, Twily’s cervix finally relaxed during her orgasm, the alicorn rushing to press the tip of her glans into the tight opening.

Twily hiccupped in surprise when she felt Twilight’s spunk rushing deeper inside her, the warmth more pleasurable than ever. It didn’t take her long to realize that Twilight was filling her very womb with her thick seed. She really was being fucked like a mare, and it was the most amazing thing she had ever imagined. Her orgasm soared with every spurt, a sense of deep contentment filling her mind.

Twilight snorted in satisfaction as she fired the last of her cream into her human broodmare, her mind swimming with contradictory feelings. She felt both proud and guilty, both satisfied and mortified. But above all she felt an all consuming love towards her twin. With a shudder she felt her cock jerk one last time, a rush of seed bursting into Twily’s sloshing womb, then she finally relaxed.

Twily collapsed on top of her mate, her mind still wracked with the aftershocks of her orgasm. Twilight’s magic was still teasing her little nub, keeping her in a permanent high, even as her cock started to soften. Twily shuddered as she felt the alicorn’s stallionhood slither out of her sensitive folds, followed by a deluge of thick seed. The white sludge oozed from her insides, dripping all over her thighs and Twilight’s groin. Twilight leaned forward to look at the mess, a big goofy smile on her lips. The alicorn looked so happy that Twily could only grin with her, putting aside her fears.

She caressed Twilight’s cheek, hugging her head close. The alicorn took the opportunity to nuzzle her breast, slobbering all over it without care. Twily giggled at the display, then her eyes widened when she saw Twilight’s cock starting to stiffen once more, ready for round two.

It seemed they were going to be busy for some time.

*******************

“Twilight?”

“Yes Twilight?”

“I think we over did it.”

Both human and alicorn squirmed in the bed, groaning in pain from their sore muscles. They were under the covers, Twilight spooning Twily in a loving gesture, her cock still embedded in her pussy. Her shaft was throbbing lazily, a new load slowly gushing into Twily's stuffed womb. The result of their previous lovemaking was oozing all over their thighs, but they were too tired to care. The moon was the only source of light, shining through the open window, the breeze of fresh air doing little against the heavy smell of sex permeating the room.

“So… Do you think you can actually fecundate my eggs with your magical sperm?” Twily asked, a quiet moan escaping her lips with every spurt.

“I don’t really know.” Twilight mumbled, her hips jerking instinctually. “Between a stallion and a human, it would be impossible. But since we don’t know how this spell interacts with humans…”

“Great.” Twily grumbled cutely. “Now I’m the guinea pig.”

“At least we’ll have a definitive answer.” Twilight chuckled, firing the last of her load, even if her cock remained erect. “We might need some more testing though. Just to be sure.”

“Right.” Twily rolled her eyes. “For science?”

“For science.” Twilight answered. She then kissed her lover’s neck, hugging her closer as they resumed their experimenting. Their eager, loving and thorough experimenting.

Meanwhile, in another room, the portal to the human world flared to life, letting a flustered human Sunset Shimmer pass through. She looked around, her eyes wide with fear.

“Please be okay, please be okay…” Sunset mumbled, clutching her magical diary to her chest. “You just forgot to look at your diary, that’s why you haven’t been replying…” She gulped. “Not because the two of you blew yourself up or anything…” She hurried out of the room, looking around widely. “It’s not like putting two crazy scientists together to work on volatile experiments would result in total disaster…” She suddenly stopped, then turned her head. Was it her imagination, or was that someone crying out? She quickly took off, running towards the sounds of struggle…

Bathroom Rumble and Broken Latex

Author's Note

This chapter may contain weirdness. You have been warned.

Bathroom Rumble and Broken Latex

The Castle of Friendship was usually a somber place at night, the occasional candle giving a faint flickering light, its huge halls eerily empty and quiet. Tonight however, it was seeing an unusual level of activity, cries and hurried footsteps breaking the stillness. Sunset gave no heed to the ruckus her heeled boots were causing, too focused on running from corridor to corridor, looking for her friends. But, after almost an hour of panicked searching, the human’s mad dash had slowed to a crawl, her legs barely managing to finish climbing one of the great staircases that plagued the castle.

“Okay this is just silly.” Sunset groaned, panting slightly. She dragged her feet over the last few steps, finally reaching the landing. “*Ugh*, where am I now?” She took one look at her surroundings, then promptly threw her arms into the air. “OH COME ON!” She shouted, red in the face. “How in the hay did I get to the front door again?! I went up three flights of stairs!” Her frustrated screams echoed around the crystal walls, seeming to come from everywhere at once.

Sunset was known for being a little bit impulsive, and she usually did her best to deny it. But right now she was starting to see her friend’s point. After just a week of radio silence from Twilight and her twin, she had suddenly decided she needed to investigate, in the middle of a sleepless night. Without thought she had jumped on her sleek motorcycle, tore through the town like a madwoman, almost crashing several times; she didn’t even call her friends before diving into the portal. Her fears had been confirmed when she was greeted with cries and yelps, and her frenzied race had proceeded on foot. If she had been less panicked she would have realized the shouts were bouncing around the crystal walls, leading her into a wild goose chase through the maze-like corridors.

“I swear, I feel like I’ve been running around this castle for months…” She took a few moments to catch her breath, hands on her knees. “Okay Sunset, get yourself together, Twilight might need you… both of them might.” She closed her eyes, listening hard, but the only thing she could hear was her own raged pants. “Right, can’t hear them anymore. It’s fine, that doesn’t mean anything. Just stay calm.” Sunset eyed the entrance hall, trying to remember which doors she had already tried. After a moment of hesitation, she took one at random, sighing. “I just hope there are no stairs this way…”

After half a dozen flights of stairs, Sunset was starting to think the Castle was sentient, and that it was trying its best to annoy her. She was seriously considering breaking through the walls to make her own way when she finally stumbled on a corridor that didn’t look like all the others. She paused, looking around in confusion. This hallway was definitely special: the furniture, decorations and pictures lining the walls gave it a homey feel, much more than the rest of the sterile and cold castle.

Sunset peered curiously at the pictures, and a small smile blossomed on her lips despite her fears. Most of them depicted Twilight and Spike, at various stages of their lives, often accompanied by what Sunset could only assume were Twilight’s parents. With a pang of nostalgia, she also noted that Princess Celestia appeared in a few of them, sometimes hugging a little purple filly with her wings, or embracing a teenage Twilight with her long slender neck. Sunset gulped; that had once been her life. She remembered vividly how soft those white feathers felt, how warm Celestia’s embrace was, how gentle the Princess could be when she tucked her to sleep with a goodnight kiss on the forehead…

Sunset blinked, taken out of her sad thoughts, surprised by the state of one of the photos: the edges were blackened, torn, the image distorted and yellow. Did it fall into a fireplace before being fished out? Looking more carefully, she realized that most of the furniture also showed signs of being burnt, as if everything had been rescued from a house fire. Dressers, vases, bookshelves… All carried several black scars. Sunset carefully ran her hand over the charred surface of a horse head statue, a good chunk of its face eaten away by flames.

It suddenly clicked in Sunset’s mind: Tirek, a name she had learned through her correspondence with Twilight. The alicorn had been sparring with the details of the fight itself, but Sunset did remember a line about Twilight’s old home being blown to pieces during her scuffle with the centaur. And if the charred furniture was what Twilight had rescued from her old home…

Sunset straightened, her gaze sweeping down the corridor. She was now convinced that she had found Twilight’s living quarters, the alicorn surrounding herself with her old memories to make the empty cold castle feel like home. And if her hunch was correct… THERE! A door emblazoned with Twilight’s cutie mark! Her room! It was the middle of the night, and since the lab had been empty, there really was only one place where Twilight would be. Unless something bad really had happened. She gulped, then carefully tip-toed her way to the door, listening for any sign of life inside. She didn’t hear anything, but she did notice that the door was slightly ajar.

After a moment of hesitation, Sunset brushed the door open, silently slipping inside Twilight’s room. She quickly spotted the bed, and a shiver of dread ran down her spine when she saw it was empty. The covers were meticulously done, not a crease on the fabric. Actually, the whole room seemed to have been thoroughly cleaned. Sunset sniffed, a faint scent of mint making her blink. Someone had used an air freshener spell very recently, if only Sunset had her horn she would be able to tell when it had been cast, and by whom…

A sound made her head snap to her left, her eyes settling on a small door, probably a bathroom. Sunset could hear muffled splashing sounds coming from the other side, as well as… humming? That was Twilight’s voice! Sunset quickly reached for the door, hope flooding her heart, and knocked three times. Before she could call out, Twilight’s voice rang from inside.

“Come in!”

Sunset sighed in relief, all tension fleeing her body, so happy she felt light headed. Twilight was fine, she had been worried for nothing. She gave herself a moment to compose herself, then stepped into the doorway. Twilight’s bathroom was lavish and wide, it could probably fit Sunset’s whole apartment inside. The bathtub alone was as big as a pool, the water inside covered in a layer of bubbles. And there, with her back against the far edge of the pool, sat Twilight Sparkle, her wings splayed lazily. She had her eyes closed, an expression of complete contentment on her features.

“See,” Twilight began, still reclining comfortably. “I told you finding the kitchen wouldn’t be so hard.”

“Yeah, this castle is a piece of cake.” Sunset said with a smirk, crossing her arms over her chest.

Twilight’s eyes shot open, her limbs flaying in surprise. She slipped backwards, her head disappearing under the soapy surface. Sunset snorted in humor, watching the alicorn flapping around like a sparrow in a fountain, before Twilight’s head broke the surface. The princess had a flabbergasted expression, a crown of bubbles atop her head.

“Sunset?!” Twilight yelped, sitting back on her haunches. “What in the name of Celestia are you doing here?”

Sunset’s eyebrow rose, a sardonic smile appearing on her lips. “Oh no, you don’t have to pretend you’re happy to see me Twilight. Oh, I’m fine by the way, glad you care so much about your friends.”

“Uuuh, what?” Strangely enough, Twilight was doing her best to surround herself with a thick layer of bubbles, her wings quickly reaching around the water for more. “What do you mean?” She said with a fake smile. Sunset shook her head, rolling her eyes, then uncrossed her arms. She waved her magical diary in the air, her brow furrowing. Twilight blinked when she recognized the book. “Oh!” Understanding flashed across Twilight’s features, then she seemed to deflate. “Oooooh…

“Yeah.” Sunset tsked, unimpressed. “Remember when you promised to keep in touch while you two were experimenting?” She tossed her diary on a counter, then gave Twilight an accusing stare. “I knew I should have made you Pinkie promise.”

“I’m sorry Sunset,” Twilight winced, guilt wracking her. “I guess I lost track of time…”

“Having too much fun with Twily?” Sunset snarked. Twilight tensed, her wings going stiff. “I bet you’ve been experimenting nonstop for days.”

“Yes… Experimenting.” Twilight gave an unconvincing fake laugh, her smile crooked. “Science and stuff…”

Sunset sighed deeply, too drained of energy to stay mad very long. “It’s fine, I really shouldn’t have jumped to conclusion.” She winced, pulling on her shirt, the damp fabric clinging to her skin. “Ugh, I’m all sweaty.” She shrugged off her leather jacket, folding it next to her diary. “Mind if I join you?”

Twilight gulped, visibly uncomfortable for some reason. “Hmm, I don’t know if…” Her eyes went wide as Sunset took her shirt off, exposing her black sports bra. The alicorn took in the woman’s generous curves, her gaze following a drop of sweat trickling over Sunset’s glistening chest, before it disappeared in the deep cavern between her breasts. “Come on in…” She said breathlessly, not really thinking anymore.

“Thanks.” Sunset said simply, brushing over Twilight’s strange reaction. The nerdy alicorn was probably just feeling guilty or something. “It’s been so long since I could take a bath with someone.” She sighed contently, slipping off her skirt and leggings. Now in her underwear, she took the time to stretch back, popping her stiffened back, unwittingly pushing her chest out. “Friendly advice: don’t try to propose communal bathing with humans; they get very strange ideas from it.”

“Gaaaah…” Twilight had her mouth open, staring. “DD cups… No, E? Fun size… Motorboating…”

“What’s that?” Sunset asked, tiling her head. When Twilight just sat there, a dumbfounded look on her face, the former pony just shrugged and reached back. “I really hate these.” She grumbled, fiddling with the hooks of her bra. “But human teats are really bothersome without… Ah, there we go.” Sunset tossed her damp bra next to her clothes, happy to be rid of it. “Now I can breathe better.”

“E… definitely E… Firm… Pear shaped… Bouncy…” Twilight mumbled. Sunset quickly slipped out of her panties, and the alicorn’s eyes drifted lower. “Natural… Fluffy bush… Carpet matches the drapes…”

Sunset put her panties away then slipped into the bath, sighing contently. The water temperature was just right, the warmth doing wonders on her tired calves. She carefully wadded into the deeper end, the water coming to her thighs. She exhaled deeply as she lowered her tense body into the bubbly surface, washing away her exhaustion. She started scrubbing herself, humming happily. She was in heaven and she freely indulged on the luxurious facilities. She was about to ask if Twilight wanted to wash her back when she heard the bathroom door click open, followed by the sound of bare feet pattering on the tiled floor. She turned, and smiled when she saw who the new arrival was.

“We need more juice-boxes.” Twily called, a straw between her lips as she slurped on her apple juice. “I made a quick inventory, and I didn’t plan on us needing this much hydration, so our supplies are inadequ…” The girl stopped dead on her tracks, finally realizing there was someone else in the pool. “… Gah?”

“Hey Twilight… I mean Twily!” Sunset called happily. She rose from the water, bubbles clinging to her bare skin. “Sorry to drop by like this, but I was really worried about you two.”

Twily squealed, shrinking back self-consciously. She blushed and tried to adjust the towel she wore around her chest, but with a juice-box in each hand, she just managed to undo the knot and make it worse. She eeped in horror as the towel fell to the floor, revealing her naked body. Twily quickly crossed one arm around her breasts, while she covered her pubis with the other.

Sunset rolled her eyes, gesturing to the squirming nerdy girl. “See? Humans.” Sunset shot to Twilight. The alicorn was looking at Twily with wide eyes, hesitating, as if she wanted to go to her twin but couldn’t get out of the bath. Sunset quirked an eyebrow, but didn’t dwell on it, choosing instead to wade to the shallows and reach for Twily. “Come on, we are all friends here, no need to be embarrassed.” She extended her hand, inviting the trembling girl closer.

Twily’s gaze quickly flew from Sunset to Twilight, her eyes flicking towards Sunset’s lower body from time to time, her blush redoubling. She shot an imploring gaze to her double, asking for directions, but Twilight was too busy staring at Sunset’s breasts, a dribble of drool running down her cheeks. Twily squeaked when Sunset’s hand unexpectedly landed on her shoulder, the older girl sporting a reassuring smile.

“Don’t worry about me Twily, I don’t care, I’m an Equestrian too, remember?” Sunset cajoled. She guessed that Twily was hesitating because she thought Sunset, as a human, would be weirded out. After all, the nerdy girl was obviously comfortable being naked around Twilight. “Just imagine I’m a pony too, it’s fine.” Sunset tugged gently, then a little harder, prepared to drag her into the bath, being both taller and stronger. She grinned when the smaller girl didn’t resist any longer and followed her obediently.

The two of them wadded into the bath, Sunset leading the red faced girl towards Twilight. The alicorn gulped as they approached, squirming strangely on her haunches, as if trying to hide something. Sunset didn’t think much of it: these two were always a little strange. Not Pinkie Pie strange, but still. She carefully lowered herself, taking a seat next to her pony friend, Twily following suit next to her. The juice-boxes sat forgotten on the edge of the bathtub, Twily doing her best to sink into the knee-deep water, her long purple bangs covering her breasts.

Sunset smiled wide. It had been much too long since the last time she had shared a bath with friends, she had missed this more than she had imagined. The last time she had tried in the human world had been during her ill fated relation with Flash Sentry. Sunset rolled her eyes at the memory: he had been the first human to actually accept her invitation, but like every other human he had misunderstood what the invitation meant. She had learned her lesson after that one.

“Hmmm, this is nice.” She sighed happily. Sunset reclined against the edge of the pool, enjoying the feeling of weightlessness as her breasts floated on the surface. Out of the corner of her eye she could spy Twilight stealing glances at them, but she didn’t think much of it. The alicorn was probably just curious about them. “So,” she turned to Twily, the girl doing her best to disappear behind a curtain of purple hair. “what have you two been up to?”

“Oh… experimenting…” Twily mumbled. “Science and stuff…”

Sunset snorted with humor. Those two were definitely alike. “Yeah, I can imagine. But what kind of experiments?” She nudged Twily with her elbow playfully, making the girl squeak again. “Don’t forget I’m a scientist too. I’m not a theorist like you two, but I can find my way around a lab.”

“Well… we’re in the middle of a… biological experiment…” Twily bit her lips, squirming cutely. “With a psychological component…”

“Sounds interesting.” Sunset scratched her chin. She didn’t have anything planned in the human world, and since she was already here… “Can I join you?”

Twily stiffened then yelped “NO!” At the same times as Twilight blurted “YES!”

Sunset quirked an eyebrow, watching curiously as her two friends leaned around her to glare at each other.

“Are you crazy?” Twily whispered fiercely to her twin, as if Sunset was not right in front of her and couldn’t hear everything anyway.

“We asked her if she wanted to participate before, we can’t retract an invitation!” Twilight whispered back, her wings fluffing in agitation.

“What do you think she’s going to do once she finds out?” Twily’s voice became shrill, an onset of panic setting in. “She’s going to hate us!”

“No she won’t, I’m sure of it.” Twilight affirmed, though her tone sounded a little unsure. Her eyes briefly flickered to Sunset’s chest, before she looked back at her twin with renewed confidence. “And we need a control group anyway!”

Twily groaned out loud, pulling on her hair in frustration. “You are just thinking with your peni…”

“Ahem.” Sunset interrupted, clearing her voice loudly. She smirked as both Twilights became flustered, as if remembering she was right there between them. “I can see you need to hash this out, so why don’t we just finish taking our bath then sleep on it.” She turned to Twily, smiling gently to prove that she wasn’t mad that the blushing girl had reserves about Sunset joining them. “Must be something pretty interesting if you want to keep it secret.”

“You could say that.” Twily mumbled cryptically. She gave Twilight a questioning look, the alicorn nodding energetically, then she sighed in acceptance. “Ok, but if we are going to tell you, you have to promise you won’t freak out.”

Sunset frowned a little, wondering what these two nerds were up to, if it warranted so many warnings. “Ok, I promise.” She sat on her knees, leaning closer. “Now tell me, is it something dangerous?”

“Uuuuh…” Twily played with a lock of her long hair, twisting it around her finger. For some reason she brought her other hand to her stomach, holding it there with a worried expression. “You could say it’s dangerous… in a way.”

“Twilight!” Sunset twisted around, glaring at the alicorn. “I hope you two are using protection!”

“Uuuuh…” The alicorn gulped, shrinking back into the water. “Protection? I don’t see what you are…”

“Glasses, lab coats, arcane shields, safety protocols…” Sunset enumerated on her fingers, before throwing her hands up in frustration. “I knew I should have accepted to come with you two. You’re geniuses when it comes to theory but you are always so reckless when it comes to applied research!”

Sunset grumbled to herself some more, the Twilights squirming abashedly. Soon enough, the former pony exhaled, then turned to Twily, a strained smile on her lips.

“I’m in, no discussions.” Sunset held the nerdy girl’s gaze, challenging her to disagree. When Twily didn’t say anything and just nodded, Sunset reached under the water and patted her thighs. Twily squeaked in surprise, but didn’t move back. “I just want to make sure you are safe.” Sunset insisted. “I almost lost my mind thinking I had lost you two, I can’t go home knowing you are really in danger.”

She leveled a harsher glare at Twilight, leaning over to bring her head closer. The alicorn smiled uncomfortably, but Sunset didn’t relent.

“I’m still mad at you for forgetting to write me.” Sunset grumbled. “We’re going to go over your safety measures, and I don’t want to hear a peep.” When the alicorn puffed her cheeks in a pout, Sunset started to reach over again. “I’m just worried Twilight.” She placed her hand over Twilight’s leg, the princess giving a strange gargled squeal from the contact. “I swear I won’t… annoy… you?”

Sunset frowned. She had meant to give Twilight a reassuring nip on the thigh, but her hand had landed on something else. She couldn’t see anything under the layer of bubbles, so she felt around the strange object. It was long and soft, draped over Twilight’s leg like a slumbering snake, but it felt nothing like it. Sunset ran her fingers over its surface, the skin gliding smoothly under her palm, vein-like bumps twitching on her finger-tips. She reached the end of the fleshy tube, her hand closing around its flat, soft tip. Twilight inhaled sharply, her whole body shuddering. Sunset gave the alicorn a questioning look, then started to ask something. The words never left her throat.

Her eyes widened as she felt the thing in her hands throbbing, growing. With each shudder the tip gained width, pushing her hand open, until she had to move her fingers lower, closing them around the tube, just under the widening extremity. The thing kept on growing, beating a steady rhythm against her palm, it almost felt like a… heartbeat. She froze, her fingers clenching unwittingly around it. Veins throbbed angrily under her grasp, pushing even more blood into the rising pole. It was becoming harder and harder with each pulse, the soft and supple shaft stiffening throb after throb. Sunset held her breath as the tip breached the bubbly surface: it was large, deep purple, and completely unmistakable.

Sunset sat there, dumbfounded, as she watched the huge horse cock emerging, her hand still clenched behind the flared head. Before long she could barely close her hand around it, then not at all. Still, she clung to it in her stupor. Finally it stopped growing, the stallionhood still jerking healthily with each heartbeat, as if trying to escape Sunset’s grasp. Her mind was trying to reconcile what she was seeing –and feeling– with reality, what with Twilight being a mare and all. She was stuck trying to convince herself that it was fake, despite the strong heartbeat running through its length, when a warm feeling against her skin shook her off her daze: a warm sticky liquid was leaking from the tip, the clear substance coating the flare, before dripping on her hand.

“Hmm, Sunset?” Twilight gulped, her breath short. “Could you please let go of my penis, please?”

Sunset gave her an incredulous look. “Yours? Really?” Unexpectedly, she leaned closer, inspecting the purple horse cock attentively. “How in the hay did you manage this? How real is it?”

Twilight whimpered. “I… I made a spell inspired by changeling magic, it’s very real.” She shuddered as Sunset’s hot breath washed over her quivering tip, precum now flowing freely down her shaft and onto Sunset’s arm. Not that she seemed to care, too engrossed in her examination.

“Texture, composition, anatomy…” Sunset breathed deeply, the scent of a virile stallion making her eyes flutter. “Wow… Is it functional?” She reached with her free hand under the water, making Twilight yelp as she took hold of her balls, squeezing just a tad forcefully. “Yep, completely functional.” She gave Twilight a cocky grin. “Though you seem to have been a little liberal when it came to size, hmmm?”

Sunset shook her head, rolling her eyes. She guessed she had found the reason for the duo’s embarrassment, and why they had been too busy to write her. This was far from the first cock she had seen, be it human or pony, but she had to admit that Twilight had created a very impressive tool for herself. The stallion scent brought back nostalgic memories, and she found herself inhaling the strong musk greedily, closing her eyes and letting herself go.

Before long she realized that her inquisitive exploration had turned into something more… sensual. She was stroking the purple shaft with one hand, smearing the abundant precum all over it, while her other hand played with Twilight’s plump balls. Sunset could feel them pulsating, expanding, the orbs filling up with seed. Excited stallion scent was now heavy in the air, it was almost intoxicating for the former pony, making her head spin. Sunset jumped slightly when Twily hugged her from behind unexpectedly, her slender arms closing around her torso.

“I’m so glad you’re not mad at us.” Twily whispered softly into her ear. Her lavender hands caressed Sunset’s stomach, breasts pushing against her back. “I was so scared you would think we were… freaks.” Twily buried her nose into Sunset’s fiery hair, hiding her face. “But if you are willing to join us…”

“Oh?” Sunset shivered, Twily’s arm brushing against the underside of her breasts. “Well, maybe I’m not sure about this anymore, maybe I’m still mad at you two.” She squeezed Twilight’s balls, eliciting a startled moan from the alicorn. “Maybe your little experiment is too big for me to handle.” Her hands gripped the purple shaft harder, stopping the flow of precum that ran all over her arm.

Twily hugged her harder, unwilling to let go, then she murmured, “We could start with a trial period.” She placed a hesitant kiss on Sunset’s nape, feeling the older girl shiver at the touch. “Star off slow. Do an alpha test, with kissing and other non committal activities.” Her second kiss was stronger, her lips pulling on Sunset’s skin insistently, her third even more so. “Then we go to the beta stage with intimate touches and maybe actual intercourse, then if things pan out…” She was now leaving small marks on Sunset’s skin, but she didn’t seem to mind at all.

“You are such a nerd.” Sunset’s breath was short, Twily’s hickeys and Twilight’s scent making it hard to keep her head. "This is by far the weirdest way anyone has ever asked me out..." She had to bite on her lips to keep from moaning as the trail of kisses traveled from her neck to her shoulders, Twily even starting to nibble on her skin, like a stallion holding a mare he was taking. “Ok, I’m willing to try.” Sunset grumbled, barely able to maintain her grumpy charade. She looked over her shoulder, finding Twily’s gaze. “But only because you are so cute… *Mmmft*!”

Twily was instantly pressing her lips to hers, cutting her off. The girl’s kiss was passionate, desperate and just a little bit awkward. Sunset was surprised by her intensity, but she wasn’t going to let the meek nerdy girl get the better of her. She responded in kind, taking control over the obviously inexperienced Twily, showing off her skills. Twily’s eyes widened as Sunset’s aggressive kiss pushed her back, a surprised squeal escaping her lips as the older woman slipped her tongue into her mouth. It wrapped around her own tongue, driving it back, wrestling it for dominance. She valiantly tried to fight back, but it was lost cause, and soon enough she surrendered herself to her new lover.

Sunset hummed in satisfaction as she kissed Twily into submission, only relenting once she was sure the younger girl had understood her place. With a loud *Muah* she released her lips, leaving Twily dazed, a string of saliva still connecting their mouths. Sunset grinned cockily; maybe it was her old pony instincts resurfacing, pushing her to establish herself as the alpha mare in this ‘herd’, or she was just simply used to be in control when it came to sex. In any case, she saw this as a competition, one she was intent on winning. She savored her victory for a few moments, but Twilight took her moment of distraction to escape from her grasping hands.

With a snort the alicorn reared up, placing her forehooves on Sunset’s shoulders, her cock exploding from the water. Her hips jerked instinctually as she mounted the kneeling human from the front, her stallionhood jerking around, searching for a place to sink in. Sunset grunted from her the sudden weight, her hands grabbing Twilight around the barrel to throw her off. But before she could push the alicorn away Twily’s hand snaked over her chest, grasping a handful of her tits. The shiver of pleasure made Sunset freeze, giving Twilight the opportunity to slide her cock between her breasts.

Twilight whinnied in satisfaction, gazing down as her stallionhood sunk into Sunset’s cleavage, Twily pressing the mounds together to hold her steady. She pushed her cock further, her legs quivering, until her flared head poked from between them. She held herself there, taking in the sight of her cock leaking all over Sunset’s boobs, her drool adding to the mess below. A low growl startled her from her daydreaming, her gaze flicking to Sunset’s face, and she gulped, a spurt of warm precum escaping her shaft as a thrill of fear ran down her spine.

Sunset was not pleased, and she was going to make sure Twilight knew it. She furrowed her brow, then, with a nasty smirk, grabbed Twilight’s ball none too gently. The alicorn gave a strange strangled cry, but Sunset didn’t let go, her hands only gripping the royal jewels harder. She shivered when Twily started to forcefully cover her neck with hickeys again, but she didn’t relent: these two could work together as they pleased, she wouldn’t give in. She didn’t bat an eye as Twilight begun to thrust between her tits, or when Twily squeezed her tits. She had them by the balls, literally for one of them, they wouldn’t win.

Before long Sunset’s breasts were slick with heady stallion arousal, Twilight’s prick leaking more and more as she enjoyed the titfuck. Sunset had to fight to keep her head clear, every breath bringing a dose of stallion musk to her sense, she could practically taste it in the air. Twilight’s shaft was rock hard, she could feel its veins pulsing against her skin, the alicorn’s plump balls quivering to the beat. Each thrust was accompanied with a chorus of sounds: the slick wet schliks of flesh sliding on skin, the heated gasps and pants, the kisses… Sunset groaned in pleasure when Twily began to tweak her nipples, making her squirm. She had to let go of Twilight’s orbs to protect her tender breasts, but as soon as she was free the alicorn redoubled her thrusting, her hips going wild.

Sunset had to clamp her tits around the stallionhood to keep it steady, least it hit her in the face, and Twily took that opportunity to let her slender hands travel lower. Sunset felt her fingers brushing against her toned belly, tracing the contours of her muscles, then Twily slipped lower still. Sunset let a small moan escape her lips at the first touch, Twily’s fingers caressing her fuzzy pubis carefully, almost shyly. Sunset couldn’t stop her exploration even if she wanted, her own hands occupied with her tits and the horse cock between them.

She had to lean her head back as Twilight loomed over her, the alicorn’s thrusts bringing her flared head just inches from sunset’s lips, spurting precum all over them. The former pony had to use all her remaining self control to keep herself from licking the syrupy nectar from her lips; the smell alone was enough to make her head spin. Twily then found what she was looking for, and gave an experimental touch. Sunset gasped out loud, her clit sending a bolt of bliss up her spine, and Twilight took the occasion to grab her head with magic before thrusting her cock into her open mouth.

Sunset’s eyes rolled back, moaning around her mouthful. Twilight’s musk tasted better than she could have imagined, the scent of a virile stallion overwhelming. Without thought she started to eagerly suck, gulping down the dollops of precum continuously leaking from the flared tip, begging for more with a strangled whinny. Twilight snorted in satisfaction, shuffling closer, looming over her mate, before she begun to thrust again. Twily had to brace Sunset as she was rocked back by the alicorn’s humping, her hands still exploring her fuzzy pubis, teasing her clit while she gently pushed a finger into her slit.

After a few moments of dazed ecstasy, Sunset came to her senses. She tried to pull her head back, but Twilight held her steady, too focused on thrusting into her mouth to notice her struggling. She hummed in protest, but her mouth was quickly filled with precum and she had to keep swallowing. Twilight’s balls were now slapping loudly against eh bottom of her breasts, leaving red marks on her amber skin. Down below Twily was diving deep into her cherry, one hand rubbing her clit while the other gently teased her open. These two had gotten the better of her momentarily, but she was not about to give up control to them.

With a low growl of defiance Sunset hooked an arm around her large breasts, squeezing them together. She reached behind her with her free hand, quickly finding Twily’s little pussy. The duo might have the advantage of numbers, she still had them on experience. She took a long breath, then suddenly started to bob her head up and down, swallowing around her mouthful of pony cock. Twilight whinnied in surprise, trying to pull back, but Sunset just squeezed her tits tighter, keeping her balls deep into her pillowy prison. At the same moment Twily squealed loudly as Sunset pushed her hand against her slit, then sunk her middle finger into her depths. The older woman begun to quickly rub her palm on her clit, stimulating Twily’s love button at the same time as her finger searched for her G spot. A breathless moan later and she knew she had it, her intimate massage becoming faster and more insistent.

In just an instant Sunset had reversed the tables. Twilight was now barely standing on her hind legs, panting like a dog, while Twily was squealing cutely, hugging Sunset’s torso as she tried to hold herself together. Far from letting up Sunset just picked up the pace, her head bobs and rubbing reaching a fevered pitch. She idly wondered who would be the first to go over the edge, and she didn’t have to wait long to find out. With a strident cry Twily’s body tensed, arching like a bow, her breasts pushing against Sunset’s back. Her pussy clamped around Sunset’s hand, but the alpha mare didn’t relent: she pushed her palm against Twily’s hardened clit, her finger tracing circles around her G spot. A breathless moan later and Twily had completely collapsed against Sunset’s back, her hands still hugging her for dear life, orgasmic shivers wracking her limp body.

Now that she had taken care of one Twilight, Sunset could focus on the last. She gently took her hand away from Twily’s quivering honey pot and harshly grasped Twilight’s balls with it. She didn’t stop at Twilight’s high-pitched shriek, her fingers kneading the alicorn’s jewels none too gently. Her rough ball-fondling and her expert sucking quickly pushed Twilight over the edge, her balls jumping into Sunset’s hands as they delivered their payload. Her flare bulged obscenely, pushing against Sunset’s cheeks, eager to spill her seed into her mate. But Sunset had other plans. She smirked, waited for the last moment, then quickly pushed Twilight’s cock away. She twisted to the side, aiming the almost-erupting stalionhood behind her, right at an unsuspecting Twily.

Twilight gave a loud cry of pleasure mingled with frustration, but she was too far gone to do anything but release her load. Sunset felt the royal scepter expand, veins pushing against her breasts, the surge of spunk rushing through Twilight’s shaft making the underside swell. She coaxed the alicorn’s release by licking the edges of her flare, her expert tongue teasing just the right spots, sending the princess into a mind shattering orgasm. Twily blinked, still in a daze, her mouth opening in surprise as she watched the flared head pointed at her. But it was too late to react.

Cum exploded from the alicorn’s cock, the powerful spurt of thick spunk splattering heavily against Twily’s face. The poor girl squealed in surprise, her outcry becoming but a strangled gargle as her mouth was filled with stallion seed. Sunset grinned as she watched the nerdy girl swallow instinctually with a shiver of disgust, spunk dribbling all over her face, clinging to her skin. Sunset watched the bulge slowly going down Twily’s throat, the erotic display sending her loins on fire. But Twilight wasn’t done, Sunset could feel her balls contracting again, still heavy and eager. She did her best to milk her stallion dry, playing with her balls, rubbing her breasts all over her sensitive shaft, and she didn’t stop when the second shot blasted Twily’s head back, or the third, or the following.

Spurt after spurt Twilight came, the pungent smell of her seed completely saturating the bathroom, her cum turning the water a milky white. Twily’s features were positively covered in the stuff, her hair matted with the gooey release, her mouth filled to the brim. At one point the girl had remembered to close her mouth, but she still had a mouth-full of spunk to deal with. She was still working on swallowing it all when the onslaught finally stopped, one last throb sending a thin squirt of spunk on Twily’s nose. Twilight moaned in exhaustion, her stallionhood softening, her hooves quivering on Sunset’s shoulders.

With a grunt, Sunset pushed the alicorn off her, sending Twilight splashing into the clouded water, giving her a taste of her own spunk. She chuckled as the princess sputtered on a cocktail of soap and cum, before turning to the girl still clinging to her back. Twily’s eyes were glued shut, her cheeks still bulging with stallion cream, a look of mild revulsion twisting her cum-glazed face. Sunset felt a little bad for it, but she knew just how to make it up to her. She quickly spun on her knees, disengaging from the hug, then forcefully pressed her lips to Twily’s.

The human gurgled in surprise, then completely melted into the passionate kiss, opening her mouth to welcome her second lover. They shared Twilight’s load, tongues meeting, and they both swallowed together. The former pony moaned into Twily’s mouth, savoring the taste of potent stallion seed, so much more powerful than a human’s. Sunset pushed the meek girl back, her hands grasping her soft breasts in a gentle, but firm, hold. Twily instantly surrendered to the dominant woman, shivering when her back met the edge of the bathtub, Sunset straddling her and sitting on her thighs as she aggressively scooped the last of Twilight’s spunk from her mouth. Still not satisfied, Sunset broke the kiss and began to lick Twily’s face clean, humming in satisfaction at the taste and her success at imposing herself as the alpha mare.

A few licks later and Twily could finally open her eyes again. She watched with bated breath as Sunset loomed over her, the older woman dominating her with her presence and stronger body. Sunset snorted in satisfaction when Twily didn’t challenge her, her old instincts appeased. She smiled gently and gave her mate a quick kiss on the nose, squeezing her soft tits one last time before rising from the water. She waded over to the still gagging alicorn, bubbles of soap and spunk on her lips, then leaned over her. Twilight blinked, then shrunk a little as she saw Sunset overshadowing her.

Sunset grunted and puffed through her nostrils, blowing Twilight’s mane back. Contrary to her human counterpart, the alicorn knew what the display of dominance was about, and she narrowed her eyes. Twilight fluffed her wings, trying to appear bigger, rising to her hooves. Sunset’s brow furrowed at her defiance, her stance widening as she prepared to pounce on her opponent. There could be only one dominant mare in a herd, and she was going to make sure it was her. They held each other’s gazes, but Sunset could see the alicorn already wavering, her eyes darting away submissively before Twilight forced them to meet Sunset’s imperious stare. Tension rose, but before the two equestrians could jump into a biting and bucking match, a high pitched whine distracted them.

“Eeeeek, it’s everywhere!” Twily cried, holding her long hair in dismay. Her long bangs were covered in strands of sticky sludge, turning her hair pearly white. “Oh my god I can still taste it! I need to brush my teeth!” Sunset and Twilight shot each other a look, then they nodded, a temporary truce declared. “Aaaah, my face is covered in saliva! Bacteria! Germs! I can feel the enzymes burning my epidermis!”

Sunset shook her head, wondering what she had gotten herself into with these two dorks. She eyed Twilight rushing to her twin’s aid, the alicorn doing her best to drain the spunky water to replace it with clean one, and she grinned. She followed her new mate, keeping an eye on the package swaying between her hind-legs, her nethers burning in anticipation.

*******************

“So, let me get this straight.” Sunset had her eyes closed and was slowly rubbing her temples. “Not only is your experiment about exploring the attraction, both physical and emotional, between parallel dimension twins.” The notion was still giving her a headache. “But you’re also studying the effect of magical semen on a different species, namely if it can impregnate them.” She heard uncomfortable shuffling, then finally two little voices confirmed it. Sunset opened her eyes, shaking her head. “You’re both unbelievable.”

After a thorough scrubbing with lots of shampoo and mouthwash, the little herd had moved from the bathroom to the adjacent bedroom. Sunset was still naked, not seeing the use in putting her clothes back on, but Twily had adorned her lab coat, for some reason; it didn’t cover much at all. Sunset had taken seat on Twilight’s bed, then indicated for the two others to sit in front of her, on the carpeted floor. There had been a moment of tension when Twilight had tried to resist the order, unhappy about Sunset taking control, but a hard stare later and she had lowered her head. Without all the excitement, she didn’t have the confidence to contest the former pony, who was both older and much more experienced at relationships than her. She had sat obediently on her haunches, right beside Twily. Sunset had nodded, glad they didn’t have to come to a fight, then had started to interrogate her new lovers.

“In my defence,” Twily mumbled, fiddling with her fingers. “I asked her to pull out at first...”

“Hey, I told you I lost control!” Twilight pouted in affront. “And you were asking for more after that!”

“That’s because the damage was already done!” Twily countered, starting to blush. “It’s not like I liked the idea or anything!”

“Pfft, right.” Twilight blew a raspberry, then started to imitate Twily’s tone of voice. “Please Twilight, fill my human pussy with more horse cum! Pour your foals into me! Aaaaah, mooore”

“YOU WERE THE ONE THAT ASKED ABOUT HENTAI QUOTES!” Twily shrieked, her face beet red. “I was only demonstrating!”

Sunset couldn’t hold back a chuckle as the two Twilights bickered. She clapped her hands, grabbing their attention. “Okay, new rule.” She marched into the bathroom, then came out with her wallet. “From now on you,” She pointed to Twilight. “are going to use this.” She pulled a roll of condoms from a hidden pocket and tossed it to the alicorn.

Twilight grabbed them in her magic, looking comically dismayed. “But… but what about…”

“No buts.” Sunset crossed her arms, supporting her heavy bust. “If you want to test it we can do it in the lab, with a sperm sample and a donated egg.” She looked at the pouting alicorn with a raised eyebrow. “And if you two want to have foals, if it’s even possible, you can do it once you are sure you are ready.”

“Hmm… I think I’m ready…” Twily murmured, only to shrink back when Sunset shot her a dubious look. “Ok maybe I’m not… Still have to finish my doctorate… Haven’t told my parents…” She gulped. “Oh gosh my family is going to freak out when they find out about us…”

“Not if you say you’re going out with me.” Sunset said with a smirk. Both Twilights looked at her, confused. “Think about it: if you tell your families I’m your mate, they won’t mind it. And if your other worldly twin just happens to be in the same relationship…”

“That could work.” Twilight grumbled. She was looking at the condoms’ tiny labels, her face scrunched in confusion. “Magnum? Flavored? What even are ‘Inches’? No flare dilatation or medial ring ratio?” She clumsily ripped one of the packets open, struggling a little. She examined the bright red rubber, stretching it, before looking down at her sheath, then back up again. “This is way too small, it will never fit.”

“Well yes.” Sunset rolled her eyes, coming closer. “It wouldn’t fit the average stallion, and you made yours even bigger.” Twilight had the good grace of looking sheepish. “Just put a spell on it and make it bigger.” She stopped in front of the alicorn, putting her hands over her hips. “It should do just fine.”

“Eeer, I guess that would work,” Twilight gulped, very much aware that Sunset’s fuzzy pubis was right in front of her face. “but how much do I… Eeep!” Twilight started, her wings shooting open. Sunset was rubbing her sheath with her foot, a huge grin on her lips. “Gnnn… Sunset what are you…”

“Well how else are you going to know how big you need to make them?” Sunset hummed, feeling Twilight’s cock stirring under her sole. She teased the opening of her sheath with her toe, then grabbed Twilight’s horn, cutting off her magic. The condom fell to the floor, but Sunset snatched it out of the air before showing it to a confused princess. “Since you already opened one, it would be a shame to not use it, don’t you think?” She could feel Twilight’s stallionhood already struggling to slip out, but she pressed with her foot, keeping it down. “And I could use some help getting in the mood too.”

Without another word Sunset pulled Twilight closer, using her horn as a handle. The alicorn gulped when her muzzle brushed against the woman’s pubic hair, and she had to choke back a squeak when Sunset pressed her foot down on her balls. The message was clear: service me, or else. Twilight quickly went to work, her tongue slipping out and finding Sunset’s nethers already damp with arousal. As soon as she gave the first hesitant lick, the pressure on her sheath eased, letting her stallionhood emerge a little, the second earning her some more freedom. Sunset even whispered “good girl”, patting her head, her toe dancing on her emerging tip. Before long Twilight was positively slobbering all over Sunset’s slit, eager to receive more praise.

Sunset bit her lips, shivering in pleasure. Twilight was pretty good at this, she obviously had some experience, and she idly wondered with which of her pony friends she had had sex. She let her mind wander, a moan escaping her lips when the alicorn pressed her tongue against her clit, before slipping inside her. Down below, Twilight’s cock was growing harder by the second, her shaft completely free of her sheath. Sunset rubbed her sole all over the lengthy rod, every twitch making her more impatient to have it inside her. She had to strain to keep the powerful stallionhood pressed against the carpet, under her power. It was jerking and bucking, now painfully hard. She smirked, brushed her toes on Twilight’s medial ring on last time, then suddenly removed her foot.

Twilight moaned into Sunset’s pussy, her cock springing back and slapping loudly against her belly, but she still kept servicing her mate. Sunset closed her eyes, enjoying Twilight’s tongue, then a warm body pressed against her side, lips searching hers. Without hesitation she embraced twily and kissed her passionately, the smaller girl throwing her arms around her neck to respond in kind. Their kiss was deep and sensual, Sunset’s hand snaking down Twily’s back to rest on her shapely behind. With a possessive grunt she grabbed a handful of her buttocks, squeezing and pulling the girl closer, her surprised squeak turning into a submissive whimper as Sunset plunged her tongue into her mouth. With one hand holding Twilight’s horn, and the other Twily’s backside, Sunset knew her dominion over them was understood, her alpha mare instincts satisfied

With a gasp she released her lovers, the two Twilights panting slightly, both their lips slick and with her saliva and arousal. She placed her foot on Twilight’s chest, the alicorn showing no resistance at all as she was pushed on her back, her stallionhood jerking against her belly. With a parting squeeze she let Twily go, then kneeled between Twilight’s thighs, gasping her cock in one hand, holding the condom in the other. She gave the alicorn a meaningful glance, Twilight’s horn igniting in understanding. The rubber ring was incased in magic, slowly growing in size.

“More.” Sunset ordered, just a little worried now that she could compare slot A with B. How in the hay had Twily even managed to take this beast? “More.” She couldn’t even get her fingers around it, what the heck. “More.” She was going to have a talk with Twilight after this, this was just silly. “Aaand, stop.” It looked about right, maybe a little snug, but it would do. She took the condom in both hands and in one smooth motion, she had covered Twilight’s flare. The alicorn whimpered a little, but Sunset didn’t stop rolling down the latex ring. “Make it a little longer.” She instructed, only satisfied when she clasped the end behind Twilight’s medial ring, securing it in place.

“It feels weird.” Twilight whined. “Can’t we just do it without, I swear I’ll pull out…”

“Yeah, sure, like I haven’t heard that one before.” Sunset snorted, giving her tip a light flick.

“Hmm, are you sure this will work?” Twily leaned closer, inspecting the stretched latex. “I don’t think the shape is right…”

“I’ll be fine.” Sunset huffed. In truth, she was too horny to stop now. Twilight was covered, it was all that mattered. She wanted Twilight to mount her, and she wanted it now. “Come here.” With a grunt Sunset grabbed Twily, ignoring her surprised yelp, then carried her bridal style over to the bed, shooting an impatient look at the alicorn still splayed on the floor. “You coming?”

Twilight scrambled to her hooves, hurrying after them. She could still taste Sunset’s arousal, and she only had to follow her scent to realize how excited the woman was. Strangely enough Sunset’s musk smelled different from Twily’s. It smelled… almost like a mare in heat. Twilight’s cock throbbed in hunger, the alicorn starting to nip at Sunset’s back to beg her to allow her to mount.

Sunset rolled her eyes, wishing she had her tail to slap the impatient pseudo-stallion on the muzzle. She carefully lowered Twily onto the covers, then climbed on the bed, crawling on top of the smaller girl. She sat on her legs again, her knees on either side of Twily’s hips, savoring the sight. Twily was less buxom than her, but the nerdy girl was still beautiful, her svelte form framed with curves at just the right places. Licking her lips, Sunset ran her hands all over her petite body, before grasping her soft breasts with an appreciative hum.

“I should have asked you out years ago.” Sunset murmured, squeezing gently, playing with her nipples. “Back when you came to Canterlot High.” She leaned closer, her hot breath making Twily shiver as she spoke into her ear. “Have you ever been with another girl?” She asked, grinning when Twily shook her head. “Don’t worry, I’ll teach you.”

Sunset gave her a quick peck on the lips, then swung her body around, positioning her nethers over Twily’s blushing face. Sunset gave her shaved pussy an appreciative look, then dove in without hesitation. Twily moaned in surprise, her back arching, but Sunset didn’t stop, her expert tongue dancing on her hidden love button, coaxing it out of its hood. She kissed her smooth pubis, sucked on her clit, lapped at her slit, anything to keep Twily moaning and squirming under her. Sunset didn’t even care that Twily wasn’t returning the favor, too focused on devouring her lover. So focused in fact, that she didn’t feel the bed shift as the third member of their herd climbed after them.

With an impatient whinny Twilight reared up, mounting her new mate, Sunset’s position on all fours perfect for her. She half expect Sunset to throw her off or worse, kick her, but she was pleasantly surprised. Sunset groaned in approval, raising her ass as an invitation, trying to make it easier for the alicorn to climb on top of her. Panting, Twilight hooked her forelegs around her childbearing hips, hoisting herself into position, her wings fluttering in impatience. A hurried heave later, and her blunt tip finally brushed against her goal. Twilight whined in frustration, the latex covering her cock robbing her of a lot of her sensitivity. She rubbed her stallionhood between Sunset’s thighs, barely feeling her soft pubic hair brushing on her shaft. Deciding she would take as much pleasure as she could despite the condom, the alicorn aligned her cock, then she threw her hips forward.

Twilight’s stallionhood parted Sunset’s folds, beginning to sink inside… and it slipped out, sliding on Sunset’s belly as the alicorn’s hips collided with her rump. Sunset grunted, her frame shacking as she took the brunt of Twilight’s thrust, but she held firm, strong enough to support the alicorn’s weight. She still huffed loudly, warning Twilight to stop playing around an rut her, the princess quickly pulling her hips back. Twilight pressed her tip at Sunset’s entrance, precum squirting inside her condom as she begun to penetrate… and she cried out angrily when her cock slipped out once again. She was about to start thrusting widely in frustration when a soft hand landed on her shaft.

Twily was panting hard, her face flushed, hands shaking slightly as she guided her twin into their new mate. She had front row seats to watch Twilight’s horse cock pressing against Sunset’s pussy, and this time she held it from slipping away. Very gently, she slipped two fingers inside Sunset’s slit, holding her tight tunnel open as Twilight slowly slipped inside. There was some resistance, but finally after a few seconds of struggles the flared head popped into Sunset’s folds, a squirt of feminine arousal dripping on Twily’s lips, her tongue darting out to collect it. Twily savored it with a sensual moan, her nethers burning as Sunset worked on her little pussy, a new orgasm quickly building in her belly. Sunset tasted like heaven, her nectar musky and strong, with a hint of… cherry? She had to try more of it to make sure. Twily gave the shaft above her a couple of taps, trying to tell her twin she was good to go. She squeaked in surprise when Twilight gave a mighty thrust, her stallionhood plunging inside to her medial ring in one go.

Sunset saw stars, pain and pleasure mixing together in one blissful moment as Twilight’s flare rammed against her depths. She heard the alicorn whinnying softly in her ear, her forelegs hugging her sides as she kept her cock hilted. Sunset felt fuller than she had ever been, her walls stretched around the enormous intruder, the latex layer thin enough that she could actually feel Twilight’s heartbeat pulsing through her cock, veins bulging rhythmically. She was then aware of a soft pair of lips exploring her slit, tongue lapping at her stretched folds, brushing against her clit. They were double teaming her again! With a low growl, she dove back into Twily’s nethers, determined to make the girl cum before she did.

Above the two girls locked in a 69, Twilight was in heaven. Despite the condom, she could tell Sunset’s insides were hot and moist, her walls clamping down on her cock. She wasn’t as tight as Twily, but Sunset was much stronger than the smaller girl, her pelvic muscles bearing down on her stallionhood, massaging her length. She enjoyed her rippling walls for a few more moments, before shakily pulling her hips back. Sunset’s tunnel hugged her snuggly, contracting around her flare to keep it inside, making every inch back a delicious torture. The edges of her flare scrapped against her contracting walls, scooping a large amount of feminine juices along the way, an eager mouth rushing to slurp it all as Twilight stopped right at Sunset’s entrance. She hugged her mare tighter, and rammed her cock into Sunset’s honey pot, a large amount of precum sloshing at the tip of her condom as she pressed against her depths.

The trio slipped into a steady rhythm, punctuated by Twilight’s mighty thrusts. After the alicorn hilted she would stay still, enjoying Sunset’s pussy, while Sunset aggressively devoured the girl under her, Twily squirming on her back and giving high pitched moans. Then Twilight would start to pull back, slowly, her withdrawal seeming to last forever, Sunset tensing from the pleasure while Twily worked her slit, eagerly waiting for the inevitable squirts of feminine arousal. Once only her tip was still inside, Twilight waited for a random period of time, letting Sunset become mad with anticipation, then she rammed back inside. The cycle continued, the slaps of flesh against flesh and muffled cries echoing around the castle.

Sunset had no idea how long they had been mating for, but she could feel her strength fading. She came a few times already by this point, and she could feel a stronger orgasm approaching, building in her stomach. She wouldn’t last long anymore, but she took solace in the fact that Twily had come a lot more than her, the poor girl already too far gone to do anything but twitch when Sunset playfully teased her engorged clit, Twily’s tongue occasionally darting out to lick her lips, feminine juices continuously dripping on her dazed face. Sunset was rocked by another thrust, Twilight panting into her fiery hair, her ragged breath tickling her neck. This time the alicorn didn’t stop to enjoy her velvety insides, her hips drawing back instantly before slapping back against Sunset’s rear without waiting to reach the entrance of her tunnel.

The frantic humping almost threw Sunset off balance, but she braced herself, afraid to hurt Twily, still passed out under them. She could tell Twilight was close, her balls heavy and plump as they slapped on her belly with every thrust, her flare growing inside her. A little afraid for the state of the condom, Sunset started to wiggle her hips, trying to make Twilight finish before she ripped it apart with her wild humping. She yelped in surprise and a little bit of pain when the alicorn suddenly bit her nape, her muzzle buried in her hair. Twilight growled like a feral stallion as she held her mare steady, her thrusts becoming even more urgent and wild. The bestial way she was taken was the last straw for Sunset, the biting sending a rush of pleasure through her body.

She whinnied loudly, cumming like never before. Her whole body shook under the waves of her orgasm, robbing her of her strength. She almost collapsed, but Twilight wasn’t done with her, the alicorn holding her in place as she took her savagely, hips slapping against her shapely behind, leaving red marks where they met. Her flare now obscenely large, straining against the overstretched condom, Twilight pounded into her mare a few last times, ready to spill her seed. Jostled by the frenzied mating, Twily came to her senses just in time to see her Twin ramming her cock into Sunset one last time, holding herself hilted. Twily reached for the purple balls hanging just above her, feeling with awe as they expanded in her grasp, ready to deliver their load.

Twilight snorted, biting just a little harder to make sure her new mate wasn’t going anywhere, then she let herself go. Twily’s eyes widened as the purple orbs contracted, she could actually feel the flow of semen rushing from them, the underside of Twilight’s shaft bulging with it. Sunset felt the surge coming, and she gave a silent prayer to Celestia, hoping the rubber was still whole.

Sunset pupils shrank to pinpricks when she felt warmth spreading through her depths, but she quickly realized she couldn’t actually feel the onslaught of semen. Twilight whined angrily as her thick release was trapped by the sturdy condom, her balls producing more and more in her frustration. Sunset breathed a sigh of relief, thanking Celestia and the almighty Trojan, relaxing. She was still riding the aftershocks of her orgasms, and was content to just wait for Twilight to stop cumming.

Only Twilight didn’t seem to want to stop. After a few spurts, the condom’s tip was already filled, but Twilight just kept on cumming and by the time Sunset realized something was wrong, the latex was ballooning out, stretched taunt and ready to burst. Sunset could actually feel the condom bulging against her walls, and before long Twilight’s had to fight against her own release to keep herself hilted. The alicorn snorted angrily as her cock was slowly pushed back by the amount of cum she was packing tightly in Sunset’s depths. Twily saw her shaft bending with effort, still spasming with new surges of spunk, her hands massaging Twilight’s balls, unwittingly helping her produce more and more semen.

Then, with a mighty growl of defiance, Twilight rammed her hips against the mass of thick spunk, releasing a new desperate burst. The condom held, but just when Sunset thought she was safe, a strange sensation made her heart drop. After being squeezed so tightly, the latex membrane had nowhere to escape… except the small opening of her womb. Sunset felt it worming its way into her cervix, the pressure pushing the condom’s tip deeper inside. In her panic Sunset contracted her muscles, trying to push it out, but she only succeeded in pinching the already overly stretched membrane. Her blood ran cold when she heard a distinctive ripping sound: the tip of the condom had given out, the pressurized pints of semen rushing into the opening.

Sunset was too tired to throw the clingy alicorn off her back, and could do nothing as a geyser of magical pony semen flooded her womb. The broken condom was acting like a funnel for the mass of thick pressurized seed, Twilight’s flared head squeezing it all into the tight opening like a piston. Twily held her breath as she watched Twilight’s cock slowly sinking back to the hilt, not one drop of spunk escaping Sunset’s depths. Before long she could see a bulge forming on Sunset’s stomach, stretching her skin taunt, and she didn’t have to wonder long to realize what it was. She had felt Twilight filling her own womb less than an hour ago.

With a satisfied grunt, Twilight finally managed to press her flare against Sunset’s cervix, pushing everything inside. A quick tug later and the condom’s tip slipped out, letting her womb seal itself with Twilight’s precious load inside. She gave her new broodmare one last playful thrust, making her inflated belly jiggle, then finally withdrew her still hard shaft. Sunset collapsed on her side, still mindful of Twily, her hands feeling around the bulge in her stomach. A million thoughts passed through her head, but she was too exhausted to dwell on them. She just rolled on her back, trying to get her breath back.

“Wow…” She murmured, panting.

“Yeah,” Twily sighed, crawling until she was lying next to her. “Twilight can get a little heated.” She rested on her elbows, watching Sunset’s chest rise and fall, sweat running all over her golden skin. “I guess it’s a pony thing?”

“No, that’s a Twilight thing.” Sunset groaned, already feeling the aching in her hips. “I’ll put her back in her place…. After I sleep this off.”

“Sleep?” Twily arched an eyebrow. “I wouldn’t bet on that.”

Before Sunset could ask what she meant, the two of them where encased in a nimbus of crimson magic. She was dragged to the edge of the bed, while Twily was levitated and gently deposited over her. Sunset felt her feet hit the carpeted floor, her ass placed just on the edge of the bed. She looked into Twily’s shifty eyes, the girl resting belly to belly on top of her.

“Yeah, I probably should have warned you, but…” Twily squeaked when something heavy landed on her ass, pressing her bare nethers to Sunset’s fuzzy pubis. She smiled apologetically. “Twilight can go multiple times in a row.”

“How many times?” Sunset grunted, trapped under the weight of both Twilights. She could see Twilight’s wings out of the corner of her eyes, behind Twily, the alicorn mounting them both at the same time. “I don’t think I can take much more…”

“Hmmm, well…” Twily paused as they both gazed at the graceful arch of the broken condom as it flew over their heads, before landing perfectly in a trash-bin on the other side of the bed. “I kinda lost count last time…” She grinned shippishly.

“Great…” Sunset huffed. She felt Twilight’s cock brushing against her pussy, before it arched up towards Twily, then it settled between them, as if hesitating. “I guess if I have foals with Twilight at least I’ll have an excuse to stop avoiding Equestria.” She smirked a little. “Thought I know someone that might be a just little bit peeved when I show up with a baby bump, particularly when I tell her who’s the ‘father’.”

“Oh, who’s…” Twily gasped might sentence, her eyes widening. Twilight had obviously chosen which one of them to fuck first. Twily was quickly rocked forwards, loud slaps echoing around the room. “who’s… who’s that?” Twily valiantly managed to ask between pants.

“My mother.” Sunset smirked.

She preempted Twily’s follow up question by pressing her lips to hers, in a move she was becoming very familiar with, and they were instantly writhing together, their limbs intertwined as a horny alicorn railed them. Twilight felt a great deal of primal satisfaction at having her two mates sandwiched under her, and she quickly switched from Twily to Sunset, her cock slipping from the tight confines of her twin only to plunge messily into the muscular depths of her old friend. Without that darn condom she could finally enjoy Sunset’s velvety walls fully, and it didn’t take long for her to build a new release.

She grunted in satisfaction as she hilted into Sunset’s depths and spilled her seed properly, the stuff pooling in her pussy, before she pressed her tip against her cervix and forced a new batch of virile spunk into her fertile womb. After only a few spurts she threw her hips back, firing ropes after ropes all over Sunset’s tunnel, turning it into a slimy mess. Her stallionhood burst out of Sunset’s pussy with a deluge of spunk, the alicorn spurting all over her lovers backsides. Twilight then forced her cock between their bellies, making sure they were coated with a healthy dose of her scent, her large shaft rubbing on both Twily’s and Sunset’s clits.

Twilight could feel Sunset’s bulging belly pushing against her flare, and her cock erupted with new energy when she imagined Sunset as an expecting mother already. A mother to her foals. She grabbed Twily harder and forced her spewing shaft into her twin’s tight slit. One vigorous thrust later, and Twily’s womb was filled once again.

Twilight grinned, knowing deep in her heart that she had impregnated them both today. Before long they would be sporting round bellies, each of them with a foal or two, and once her children were born, she would take them again and again. Maybe it was her alicorn magic, or just animal instincts, she just knew. But still, she kept on pumping more into her twin, before switching again, Sunset moaning in protest as her already filled belly grew even bigger. Twilight didn’t stop, focused on breeding her mates.

The castle echoed with the sounds of love and lust for the rest of the night, breaking its usual silence.

Maybe nights would never be lonely or silent again in the castle, be it because of the cries of passion, or the laughter of an army of future little foals.