Speaking of Getting Tanked...

by zetasquadron94

Rating: mature
Tags: Pinkie Pie, Twilight Sparkle, Anthro, My Little Pony: Friendship is Magic, Rainbow Dash, Fluttershy, Porn, Sex
Length: 5055

Discovering the powers of the zap apple cider, Dash decides to share it with the rest of her friends...

Rainbow Dash discovered the effects of zap apple cider are more than meets the eye. What next but to share it with the rest of the Mane Six? She shares it with her marefriend Twilight, and they plan to show the fun to Pinkie Pie and Fluttershy next.

A gift request by Superfun

Futa, female to futa, futa on female, f/f/f/f, foursome, transformation, mild breast expansion, excessive cum, plenty of cum and foal batter, anal, oral, vaginal, mildly dubious consent(they're all drunk one's just slightly less drunk)

Published 2025-02-17 00:00:01 UTC
Last updated 2025-02-17 00:00:01 UTC

We should see if there's more cider around here!

It was late in the day. Business at Sugar Cube Corner was slow, and the Cake family was on vacation. The only ponies who were there were Pinkie Pie, at work, and Fluttershy, nursing a small drink. The store sold a few beverages along with their snacks, and Fluttershy liked to come in occasionally.

“We’re closing up soon, Fluttershy,” Pinkie said.

“Oh! Okay, let me just pay…” Fluttershy put a few bits on the table. Pinkie collected the money and walked back to the register. She’d just put the money away when the door opened, and Rainbow Dash and Twilight Sparkle walked in the door.

Pinkie looked up to welcome them, then gasped. Fluttershy looked up and nearly knocked her glass over in shock.
“Hi girls,” Dash said with a grin. She stood in her flight jacket, a t-shirt, and pants, holding a six-pack of cider. The densely built mare put an arm around Twilight, wearing a skirt and a t-shirt, who rolled her eyes and smiled sheepishly, “What’s up?”

“What– what happened, Twilight?” Fluttershy asked. She stood up and approached.

“Yeah, when did you get so much weight?” Pinkie asked, coming around the counter.

Twilight looked down at herself. “Uh…”

Rainbow looked at her theatrically, “Why? What happened?” She grinned again.

Fluttershy stammered. “You– You look like a…”

“Alicorn crossed between Luna and Cadence? That's what I was going to say!” Pinkie exclaimed.

Twilight was no taller than she had been, but practically everything below the neck had changed. Her waist was drawn in. Her hips had widened substantially with thick thighs to match. She had formed an hourglass shape. Her arms had bulked up. Her breasts had expanded to nearly triple their size and bulged out of her shirt. She was the perfect curvy balance of Luna’s warrior body and Cadence's regal skinniness.

“Dash brought some new drink she found. When we drank it…”

“Rainbow, did you not know what would happen?” Fluttershy demanded nervously.
Dash went red, “Twi’, I hope you don't feel like I forced–”

“I could have chosen not to drain the entire bottle, sweetheart,” Twilight winked.

“When you drank it, then what?” Pinkie asked excitedly.

“She found it out with Rarity and Applejack,” Twilight said. “It seems the drink is capable of not only removing inhibitions but also granting the user certain wishes.”

“Oooh, sexy…!” Pinkie breathed, looking at the bottles.

Dash nodded, “So I wished she'd enjoy her alicorn looks more.”

Fluttershy narrowed her eyes at Dash. “Her alicorn looks?”

Rainbow Dash went red again. “She was into it! I swear!”

Twilight nodded, “I know she's kinky, Fluttershy, but don't worry about it.”

“Seems pretty neat to me!” Pinkie said, pulling Fluttershy into her arms, “Wouldn’t you like to experiment?”
Fluttershy blushed, “Well– I–!”

Twilight flushed, embarrassed, and looked down at her new form again. “I, uh…”

“Girls, it's great!” Dash insisted, and held up the bottles, “This booze, it’s some sort of zap apple booze, it can transform you when you bang someone!” She grinned lecherously, and looked at Fluttershy’s chest, “You can have a lot of fun like this.”

Twilight nodded, relieved, “I was hesitant at first, but it's a lot of fun!”

“I don't know…”

“Come on Fluttershy, give it a shot!” Pinkie exclaimed.

Fluttershy looked at the bottles. She blushed. “I… I guess I could.”

“Great!” Pinkie pulled a lever. All four suddenly fell through a trap door, vanishing into darkness.

All four ladies found themselves riding a steep slide. “What the hell is going on?!” Dash shouted.

“Enjoy the ride!” Pinkie shouted back, “Here it comes!”

As they slid, they all could see something in the dim light reach out for them.

Twilight felt her arms pulled up above her head. Dark grabbing shapes seized her wrists and clamped them together. The air rushing past ballooned up her shirt, which flew off with a yelp. The others similarly felt their shirts pulled off, their arms forced over their heads.

Fluttershy lost her sweater and felt something catch on either side of her. Snap! The strings of her bra tore. “What–? No–” Too late. Two arms reached out of the dark and pulled diagonally. She shouted as her bra was ripped apart. Her breasts bounced and jiggled in the dark. “What is happening?!”

“I don't–” a topless Dash grunted as a piece of skirt flew in her face. The shredded remains of Twilight's skirt flew past her. “Pinkie, what kind of pervy toys do you have down here?!” The arms grabbed Dash's pants. Huge chunks of cloth were ripped away. Before she could think, the rest of her clothes were torn away.

“Whee!” Pinkie cried, getting the full force of the clothing fragments.

Everything on their bodies was yanked, torn off, and destroyed. The four let out more shouts of confusion and dismay.
Just as Pinkie's shoes were annihilated, one, two, three, four! Another catch snapped the bindings holding their arms above their heads.

They tumbled out of the slide, landing on a pile of cushions. Twilight landed on her chest. Rainbow Dash came on top of her, her bare cock brushing against her leg. Fluttershy landed on both of them. It knocked the wind out of them. Pinkie Pie finally emerged and plowed over the three of them like bowling pins.

They finally came to a stop in the cave under Pinkie's house.

Amidst the pile of naked mares, Dash held up a box, “Hey, the drinks are still good,” she mumbled.

The four ladies sat there naked, panting for breath. Dash grunted and rubbed her rear. Fluttershy covered her chest. Twilight turned, her body jiggling slightly, and demanded, “Pinkie! What in Equestria was that?!”

Pinkie shot to her feet. “If we're going to do hanky panky I figured it would be good to do down here!”
“Sweet Celestia, you're kinky, aren't you?”

“I'm Pinkie if that's what you mean! Now, let's see some of this booze!” She had short limbs but proportional to her size. Her pink form was quite attractive to many with how plush and soft she was. Despite, or perhaps because of her muscle from her life on the rock farm, she had a distinct chubby shape that was frequently accentuated by her outfits.

Dash was a densely packed, strong muscular swimmer's build. Her stallionhood began to stand as she looked at the naked mares around her. She handed out bottles as she eyed up Pinkie. She and Fluttershy had done it before, but she’d never seen Pinkie this open. Her eyes shifted to her marefriend.

One would have expected Twilight’s new body to be a copy of the other alicorns, but despite the extensive modifications, she still retained the atmosphere of a librarian. There was a gentleness and softness that remained regardless of how her body was transformed.

Fluttershy’s long, slender, butter-yellow limbs extended as she stood to her full height. She was still the tallest in the group. She had surprisingly large boobs for her size, and a long sleek body capable of speed. Her hourglass shape drew the eyes of many in Ponyville.

The four mares examined each other with lustful gazes. They are old friends now, though some more recent than others. The reality of what they were going to do now struck them. Dash was willing but knew the others might be shaky. Twilight looked at the others with hesitation, but a willingness all her own. Pinkie brushed some lint from her ruined clothes off her hips, she was down for whatever. Fluttershy tried to protect her modesty. She was the key. But while she was hesitant, she had never outright refused…

Her hands over her breasts and her vag, she slowly let one hand fall. “L…let’s do this before I…”

“Lose your nerve? You got it!” Dash handed her a bottle of the cider.

Fluttershy took it, looking down at the rainbow colors in the bottle. As she stared, her posture straightened and relaxed a bit. Dash grinned as she noticed the vibes her friend was giving off. Fluttershy was quite the modest mare, but Dash knew how much she enjoyed the bedroom, so to speak. Fluttershy looked at her. She gave a sweet small smile, filled with love and affection. Nopony was pushing her into this. Damn, she wants this!

Fluttershy gave her a peck on the lips. Then tilted the bottle back and began to drink. “Mmpphh!” Rainbow Dash reached up and tipped the bottle into her mouth. Fluttershy seemed to panic but did not try to stop swallowing; she gulped the juice down with gusto.

“There we are…” Dash said, grinning.

“Let’s go!” Pinkie chugged her own bottle and touched her body to try and feel the changes come to life.
Fluttershy drained the entire bottle, and let it go into Dash’s hand. Rainbow grinned at her, “So? How is it?”

Fluttershy coughed and sputtered a bit. Then she felt a strange sensation in her esophagus and her belly. She looked into Rainbow Dash’s eyes and gulped.

She felt a spark of magic, a vibration all through her nervous system. Fluttershy already had big boobs. She didn't have far to grow there. The potion instead bulked up the rest of her body, packing on kilos to her borderline underweight form, filling out her skinny frame to something merely slender. She stumbled backward, falling onto a pile of cushions in a corner of the cave. She lay back on her elbows, looking down breathlessly at her transformed body. “Oh my…” Her body was still thin, she had developed a mass that made Dash's erect boner rise even higher. Twilight licked her lips and had her hand by her pussy.

Pinkie was masturbating, but as the others looked at her, her hand stopped for a moment. As they watched, she began to fill out as well. Her curvy body added a few kilos to make a squishy plus-sized form; fat packing itself on. They were curves meant to squeeze, to hold onto, perfect for her personality. Her thighs thickened out like a marshmallow filled with air. As her body grew, she started to yelp. The others watched as her pussy sealed up. A line followed the seal, up to her clit. As she tweaked it, her clitoris expanded, and enlarged. It went in between her index finger and thumb. She began to masturbate again. Swiftly a cock developed in her grip, and she loved it all the more, rubbing and squeezing it. “Oooh!” There was a squirt of cum, and she cried. She looked down as fat tit-flesh began to obscure her vision. She squeezed her new fatter boobs. “Well, I've still got a way to go! Feels like they’re full of milk chocolate!”

Rainbow Dash stepped forward, “Let’s begin,” she said. She went down onto all fours and climbed up Fluttershy’s body. Her erect cock dragged itself along yellow limbs with a dribble of precum. Fluttershy squeaked and covered her face. Dash immediately stopped. Her face softened in concern. “Hey, if you don’t wanna…”

She trailed off. Fluttershy’s hands were hiding a deeply red face… and a sly smile. “W-well if we’re going this far already…”
Dash’s lecherous expression returned. She climbed further up and felt Fluttershy running her hands up her flanks. “Yeah, you like those muscles, don’t you?” She murmured. She put her cock between Fluttershy’s new squishy breasts. “How about I use them?”

“Don’t leave me out,” A voice said in her ear. Twilight crawled up to Fluttershy’s legs.

Dash looked back at her, seeing the fine curvy shape of her mare friend, “Oh, sorry Twilight, you wanna…?”

Twilight shook her head, “Just for that, Dash? I’m not gonna.” She leaned down and began to lick at Fluttershy’s snatch instead. She licked and tweaked her clit, while using her hands to stimulate her vagina itself. The pegasus squeaked and fidgeted. Her legs threatened to pull free.

Rainbow got back in the game. She shoved her dick up higher, brushing against ‘Shy’s lips, “You like it, don’t you? I remember.”

They had fooled around once before. She was the only one who knew Rainbow Dash was a futa before today. She licked her lips, inadvertently brushing against the cock. With that, Dash shoved her dick in Fluttershy’s mouth.

Her blue penis filled Fluttershy’s mouth easily, precum already sliding down the back of her throat. Dash gave a delighted exhale and began to thrust. “Mmph!” Fluttershy felt it ramming against her, moving and rubbing against her newly transformed boobs. She struggled and writhed in sheer exultation. Twilight sucked on her clit, tingling and licking it just as Fluttershy did her blue partner.

“Don’t leave me hanging,” Pinkie said. She straddled Twilight’s legs, splayed out behind her.

“Pinkie, what are you– Pink-eee!” Twilight shouted. Her eyes went wide as she felt her rear widened. She hadn’t done it back there yet with anyone!

Hard and dry, Pinkie jammed her new appendage right into Twilight’s rear. The alicorn’s buxom rear pushed rapidly against Pinkie’s swollen balls. She squeezed as if to try and get it out, but that only intensified the strange sensations. “Oooh, you’re real tight back here!” She said through gritted teeth. “Come on!”

Twilight winced, and nearly bit down. She sucked on Fluttershy again making her squeal. “Go easy!” Dash exclaimed, “It’s a fuckin’ daisy chain– ooh, Flutters keep doing that…”

Pinkie wasn’t listening, “Almost got it…!” She thrust again and again, harder and faster, “Come on!”

Twilight gasped and was pushed forward. Why didn’t anyone tell me it would be like this?! She liked it rough on occasion, but she had never considered it with anal. Going in hard and rough… I… oh Celestia– Oh my– I kinda like it!
Pinkie felt up her large ass, squeezing her hips. She leaned forward, “I bet Dashie likes these new tits of yours!”

“I like all tits, Pinkie!” Dash moaned.

Dash slid back as she felt a rising sensation. It was tension and release at the same time. Her cock erupted in a gooey cannon blast. Fluttershy’s eyes widened, “Mmpfh!” Cum filled her mouth. Her throat was engulfed in a dense mixture of ooze. As Dash pulled back they both squeezed Fluttershy’s tits. White goo sprayed across both of them. Fluttershy moaned and shouted, her voice echoing through the cavern. She felt a lightning strike run through her body and a bulging bursting sensation in her vagina. Twilight shouted as a fine-tasting thick fluid blasted her in the face. She licked and slathered at Fluttershy’s marecum. Just as anal had been much better, marecum was too.

Then her eyes widened too. “Here it comes, Twilight!” Pinkie shouted.

Twilight’s eyes popped out of her skull, “W-wait–!”

She felt it swelling up in her anus. Her voice dissolved into a low drawn-out wail. White hot magma shot into her ass. It filled her internal cavities like cement. It swelled out like a reverse push, entering her and becoming part of her, into her. It keeps coming! Oh my celestia there’s so much…! She felt herself expanding like a balloon, her generous behind turning into a cum storage cavity. She came then and screamed. Her moaning was interspersed with other shouts. She came twice in a row.

“Jeez you’re good, Twilight…” Pinkie moaned. She rubbed the purple mare’s ass, and her flanks, “You take so much, so well!”

The girls collapsed onto one another in a ragged, sexually charged pile. Their various colors were slathered with the combined jizz of multiple body parts. They panted in exhaustion, emotional energy spent for the moment.

“Sweet Celestia, Pinkie…” Twilight gasped, “Why do you have a sex dungeon?” She rolled over onto her back. She hadn't checked the density of jizz recently but it felt like her backside was replaced with concrete. Her hips had widened out even further than before.

“It's not a dungeon, Twily! It’s a party planner room that doubles as a multipurpose room!”

“I mean, she’s not wrong…” Fluttershy sighed, lifting her head from under Dash. There was a bit of a paunch in her stomach. She rubbed at it and laid her head back.

Pinkie straightened up. Her bulbous new form jiggled and wobbled. The other three women’s eyes wandered across her form. She felt her cock. Somehow it regained energy. “Who's next?” She murmured. She made a long drawn-out “mm” sound before her eyes found her target. “...mm, Twilight!”

“Oh come on–!” Twilight groaned. She tried to scooch away but the earth pony was insistent.

Pinkie pushed Twilight back onto the pillows. She hovered over the mare's new form, her own altered body a heavy weight on Twilight's belly. “I like your boobs, Twily,” She said. She felt her up, and squeezed her nipples, tracing the curves of the gravity-defying orbs. She placed her new pink member between her tits, forcing them together. Sweat dripped off Twilight's skin onto Pinkie’s dick. Twilight sighed with contentment. The tip of Pinkie's dick brushed against her lips, and inadvertently licked up some precum.

Twilight licked her lips again and gulped. Her lust was overpowering her ability to think. Pinkie's plush form was stunning. Her type was generally hourglass-shaped with boobs or an athletic shape like Dash. She ran her hands up Pinkie's soft and squishy sides, the chubby form awakened something in her. She touched Pinkie's boobs, making her giggle. A new fetish had just developed. She wondered how a chubby Starlight might look, then shook her head. A little bit of reason won out. “Pinkie, you just filled me up, why not–”

“I know you forget to eat,” Pinkie said lustfully. She squeezed Twilight's breasts. “So why not fix that with a little snack?” Then she hesitated. “But who's gonna keep her occupied?”

Fluttershy wordlessly dropped to her knees. Her tongue slid out to suck on Twilight's clit. Twilight's eyes rolled back in her head, “Oh, Celestia…!”

“Alright!” Pinkie exclaimed.

“Pinkie…!”

A voice spoke in Fluttershy’s ear. “You've eaten a lot of cum. How about taking it?” Dash asked.

Fluttershy looked up. “Rainbow, please be gentle!”

Dash grinned. “Oh, don't worry. I know what the ladies like. Ladies like grinding treads.”

“Depends on the lady but some do like steam tractors grinding their tracks!” Pinkie commented.

“What?”

Dash yanked up Fluttershy’s midsection, putting her hindquarters in the air. Dash rubbed her cock between her legs, “Here goes!”

The dick slid right inside the moist pegasus. Fluttershy let out a squeal and her lips came down on Twilight's clit. Pinkie pushed her big pink member into Twilight's mouth. Twilight's eyes rolled back and she found her tongue pressed against the floor of her mouth. Fluttershy licked away at her clit, headless of the juices leaking onto her chin. Twilight arched her back. Pinkie leaned back, “Nope! You're gonna have fun and like it!”

This didn't seem physically possible. Pinkie thrust into her further and further. Her jaw was held open by the enormous member. Perhaps it was even bigger than Dash's. Yet as she was getting titty fucked, Twilight felt the member curving down into her throat. Her gag reflex didn't even twitch. This can't be! “Mmph!”

“Oh yeah, take it!” Pinkie said playfully. Fluttershy kept bobbing up and down on Twilight. Rainbow lunged into her over and over, “Yes, yes, yes…!” Her blue cock had filled up the pegasus with little room to spare.

They moved as one enormous machine. Dash thrust into her pegasus; Fluttershy would give a little squeak and lick at Twilight. Twilight’s pelvis would rise. Pinkie Pie’s midsection would shiver and push her ever further between Twilight’s new tits and into her throat. Twilight could feel it enter her esophagus, she felt it push its way in. Her vision was dominated by Pinkie’s grinning face, and the dark of the upper ceiling.

Then Pinkie grunted and slid forward. Twilight’s face was pushed back. Her lips were pushed to their widest diameter by Pinkie’s enormous cock. She had bottomed out against Pinkie’s huge member.

Pinkie patted her cheek, “Oooh, good girl, Twily! I can see why Dashie likes you so much.” She leaned forward, her face twitched as she thrust again. “You can take it so well!”

Twilight tried to move her head, but she was caught between Pinkie’s thighs. The baker put her weight on her knees and began to move. She pulled a half inch of meat out of Twilight’s mouth, then pushed it back in. Then a whole inch. This is impossible! The princess thought. Here she was, flat on her back, being pleasured by two mares who were of impossible attractiveness. Fluttershy pinned her feet to the floor with her elbows.

Twilight was well and truly stuck. Ooh, oooh, Celestia! She couldn’t even speak. The width of her cock, the depths… oh Celestia, is she reshaping me?!

The thought of being permanently remade into somepony’s toy, into their… cocksleeve, as some of Rainbow’s more lurid magazines described it, was horrifying, sickening… yet the idea also fascinated her in a way that confused and astonished her.

“Someone’s gettin’ into it!” Pinkie said, leaning back. Twilight heard Fluttershy squeak and felt her teeth brush against her clit. Pinkie’s sleek, smooth skin shone in the light, sweat reflecting off her pudge hiding her muscles. She panted with exertion, her chest rising and falling. Twilight’s eyes widened and she groped out, reaching for the large milkmaid boobs. Pinkie groaned and grabbed her hands on her tits. Then she used those same taut muscles to force her arms down.

Pinkie looked down at Twilight and gently pushed her arms to either side of her head, forming a sort of Y-shape with her arms. She kept thrusting. Twilight’s purple boobs bounced against her ass. “Yes, come on, Twilight, come with me!”
With the slickness inside her, Rainbow was able to go in even further than before. Fluttershy shouted, and then she felt Dash’s hand on the back of her head. “Come on!”

“Rainbow–!” She drawled.

Dash slowed down. But even with her head pushed against Twilight’s pussy, she could see that grin at the back of her pink head. “Alright.” She slid out gently.

Fluttershy arched her back with the shock. She stopped licking at Twilight’s pussy and looked back. Rainbow Dash had pulled out her cock, and was realigning it. Like watching a medical injection while wanting to avoid staring at it, Fluttershy’s head weaved back and forth. Then Dash thrust.

This time, the thrust was much less shallow… and much more powerful. Fluttershy felt her insides being rearranged. She felt her guts pushed around. Her womb was being pushed up into her stomach, pushing, pounding, thrusting… it was too much! All too much!

Fluttershy risked a brief look below. Her eyes widened. To her disbelief, she could see a lump moving under her belly. She could just barely make out a cylinder brushing her stomach aside. Then Dash’s hand tightened on her hair, and she was back to pleasuring Twilight.

Does this drink remake our bodies? Just how deep does it go?! Fluttershy shrieked in her mind. What was worse/better for her, was how that thought made her lick and drool over Twilight’s pussy even further.

The four mares were caught up in their tawdry steam engine affair, no one set of genitals went unpleasured, as clinical as that may sound(as Dash commented later).

But, Twilight felt an expansion. At both ends of her body slick squishy somethings were expanding. Pinkie began to speed up. Her climax was near, she just had to chase it over that cloud… Fluttershy could feel Dash’s cock widening, forcing her own body wider.

Finally, they all came to a climax. “Whoa, what the fuc–?!” Dash was cut off.

Fluttershy cried out. Dash screamed. A blast like a machine gun erupted into her. With every blast, Fluttershy’s stomach expanded. There was a deep sloshing sound as each blast spattered against the inside of her body.

“Mmmph!” Twilight screamed. Pinkie’s cock expanded in her esophagus. She could hear the cum roaring. Pinkie’s enormous testies pumped a gallon of white-hot fluid down her throat at ninety miles an hour. Twilight felt like she had her mouth on the end of a garden hose. There’s so much! It’s so intense, it’s–! Her thoughts died into a shriek of ecstasy, as she exploded across Fluttershy’s face.

Her eyes coated in marecum, Fluttershy could do nothing but scream as she felt a sensation like a firehose more than a garden hose. It poured and poured.

Both sets of ladies broke apart, cum splattering in all directions. The stallionhoods had finally tapered off, and the girls lay in a heap once again, coughing and sputtering, a bit more animated this time.

Rainbow Dash was the first to speak. “That was your kink?” she coughed.

“Skinny and cum filled? Very nice, Butters!” Pinkie exclaimed.

“It seems like we can all influence each other,” Twilight observed, “I suspect this all wears off when we’re sober.”

Dash grinned. “Alright, now let’s get down and dirty.” She tackled Twilight. They ended up on the floor, with Dash’s hands on her shoulders. “Just me, and you.” Twilight’s face was beet red. Dash grinned sheepishly, “Me domming a princess, who'd've thought?”

“Anyone who knows your secret stash,” Twilight said haltingly.

Dash dragged her cock down between Twilight’s breasts. She felt Twilight’s hand slide down her leg, onto her own body, and down to her snatch. Her horn powered up, and Dash said, “Gah!” There was a two-prong feeling. She could feel a dildo sliding into her lover’s body, and… “Gah!” Another prong went right into her ass too. She looked down at the alicorn, “Celestia be damned, you’re kinky, Twi!”

“You knew that when we started to–” On the last letter Dash thrust forward. “Ulp!” It slid right into her mouth.

“Alright, Fluttershy, I know Dashie can be rough, so wanna go slow?” Pinkie asked.

Fluttershy nodded but gave a small grin of her own. She pulled Pinkie down onto piles of fabric. Pinkie’s eyes widened as Fluttershy walked forward sensually, swinging her hips clumsily but with the right spirit. “We’ll do this,” she said and kissed her. She rested her weight on PInkie’s wider body. Their tongues entered the other’s mouth. They explored one another deeper than ever before.

Fluttershy felt her erection against her thigh. She leaned back and felt up PInkie’s breasts. Her eyes widened at the sensation. They were like watermelons, soft and plush. She felt the wider, shorter, denser cock than Dash’s. She could get used to this.

She slid herself down, matching her height to her old friend’s, and lifted her cock to penetrate her. “Now, Fluttershy, don’t you want–”

“Aaah!” Fluttershy let it slide into her. She felt it squeezing, wider than Dash’s. It felt like her insides were trying to keep it out, but she wanted it in. She wanted this!

She threw her head back and let out a cry of exaltation. She rocked her hips back and forth, upward like a steam engine. Her large breasts bounced up and down. Pinkie went in and out of her, “Yes, yes, yes…!”

While Pinkie and Fluttershy were more sensual, the other two were a bit rougher. Rainbow Dash had Twilight flat on her back, and her hips like a jackhammer. She pounded into Twilight with all her might. Her cock widened and bulged inside the alicorn's snatch. It filled up with all the backed-up cum she had stored away just for her favorite lover.

Twilight arched her back and moaned. The cock spread her out and she had no clue now if she could settle for anything less. For an alicorn to be so submissive underneath a big muscular futa was strange, but felt so right.

Twilight had found recently that despite how headstrong she could be, she loved to indulge in a submissive side, but only with people she deeply cared about. Fantasies of Luna, Celestia, Cadence, the rest of her friends, a brief flash of Chrysalis, and a lingering glance at Tempest Shadow filled her mind. Then they swapped out with the reality of the beautiful mare atop her.

She looked down at her bouncing breasts, the tit-flesh she had envied in her mentors. Rainbow Dash had transformed her, modified her body, into an idealized alicorn shape. Not necessarily the one the nerdy mare would have picked, but she found she was okay with that. Twilight felt the new echoes and motions of her body. She grinned. She hadn’t picked this, but like anything else she had found tonight, there were many things she was fond of she had not discovered.
Suddenly Dash's thrusts slowed. She leaned down to breathe in Twilight's ear. “This is my alicorn,” she whispered, “There are many like it, but this one is mine.” She thrust.

“Dash–... Dash… Dash…” Twilight moaned, “I can feel it, I can– Aaah!” Twilight came and squeezed. Instantly Rainbow’s hips became a blur, spewing individual enormous spurts of white-hot foal batter deep into Twilight's body.

“Agh!” Twilight’s eyes rolled back in her head as her pelvis ground into the cushion, trying to escape the punishment it was taking. Her hips began to bulge out. Her trim waist inflated, erasing any shape of an hourglass figure with every single thrust and dousing of cum.

“I'm gonna keep you,” Dash growled, “And I am going to pound you, and I know you like it rough!”

The last burst made them both cry out for joy. It expanded and burst out, joining the white cum in filling Twilight out.
Fluttershy screamed. Pinkie shouted over her, an up-and-down inarticulate cry of fulfillment. Fluttershy’s already enlarged body was inflated further. She bulged out, looking like she was eight months pregnant with several gallons of cum.

Dash continued to gently thrust as she cooled down. Across the room, Fluttershy and Pinkie were coming down. The pregnant-looking mares pulled off their partners. Dash leaned against a wall. Pinkie was hunched over, gasping. All four women lay there silently.

“I know you said this will wear off when we’re sober,” Dash said slowly, “But what about pregnancy?”

The girls looked at each other, then down at themselves. Twilight sighed, “I’ll figure something out. I'm sure it's nothing to worry about.”

The other mares chuckled.