Rainbow Dash's Relief

by Jest

Rating: mature
Tags: My Little Pony: Friendship is Magic, Rainbow Dash, Sex, Twilight Sparkle
Length: 9870

Rainbow Dash buys a tentacle creature for a little relief but predictably, she doesn't read the instructions and ends up getting more then she bargained for.

Rainbow Dash buys a tentacle creature for a little relief but predictably, she doesn't read the instructions and ends up getting more then she bargained for.

Kink warnings. nipple fucking, ovary penetration, triple penetration and then some, infation,
dubious consent, all the way through, lactation, breast growth, huge insertion, stomach bulging,
and probably more.
Featured! [img]https://i.imgur.com/IvaafWH.png[/img]

(note, the cover art only vaugely resembles anything that happens in the story. Done by Kinkypie)
Done for an anonymous commissioner~!

Published 2017-10-13 20:40:12 UTC
Last updated 2017-10-13 20:40:12 UTC

The one, the only.

Rainbow Dash stopped before the library’s door, stepping from hoof to hoof nervously. Indecision clouded her judgement and, for a moment, she considered simply turning around and returning home.

She put her hoof down and swallowed her fear, standing tall and unafraid. So what if she was about to retrieve a sex toy she had purchased for the sole reason that it could stuff every single one of her holes, fucking her continually and relentlessly until she was nothing more than a cum filled wreck? What she did behind closed doors was nopony’s business!

With head held high in pride, she lifted her hoof and knocked on the door.

“It's open! This is a public building, you don't have to knock!” Called out the familiar voice of Twilight’s number one assistant.

“Heh, right.” Rainbow opened the door and stepped into the library.

“Oh, hey Rainbow! What’s up? Need that book on exotic plants again? I don't think it's been put back yet…” The dragon trailed off, shuffling the returned pile of books onto a nearby desk.

“No! I mean, no that's not why I’m here. Is Twilight around? She uh, had something for me.” Rainbow rubbed the back of her neck nervously and looked anywhere else than Spike’s inquisitive eyes.

“She just ran upstairs a few minutes ago, muttering something about a sensitive package she just got.”

Rainbow’s eyes lit up and she surged forward, grabbing the young dragon and hoisting him into the air. “Did she say where it was from?”

Spike scratched the side of his head and looked up slightly. “Don't think so, just that it was very delicate and needed sunlight right away. The box was pretty big too with these air holes on it and this big red warning sticker. Why-oof.”

The dragon was dumped unceremoniously on the ground, but before he could turn and yell at the impatient pegasus, she had already zipped upstairs, leaving behind nothing more than a couple of questions and a rainbow streak. “What the...?” Spike picked himself up and dusted off while shaking his head. “Mares.”

Upstairs, and away from a now grumbly dragon, Rainbow flew straight into Twilight’s room, hardly stopping to open the door and briefly considering just shouldering her way through the portal. Reluctantly, she slowed down and actually opened it, nearly running into a stunned unicorn on the other side.

“Rainbow?” Was all the mare could say before being bowled over and landing in a heap of tangled limbs.

Scrambling quickly, Rainbow extracted herself from the tangle of limbs, pointedly ignoring the fact that they very nearly smacked muzzles. “Sorry about that Twi, is it here?”

The unicorn dismissed the stars floating above her head and picked herself back up, letting out an annoyed huff. “Yes, it's here. And how many times do I have to tell you about no flying in the library? You’re going to seriously injure somepony one of these days.”

Rainbow Dash would have been annoyed at receiving yet another lecture from Twilight, but she wasn't listening. Her eyes were glued on the unassuming brown box sitting on a nearby desk, her ears deaf to anything other than the pounding of her heart.

It was finally here!

With a surge of her wings, she flew over to the box and grabbed it with both hooves, tearing it apart in order to get at her much awaited prize within. To her horror, the box was empty, and she turned to Twilight only to receive a telekinetic flick to her nose.

“I was just about to tell you that I inspected it and put it in a bag for you so it was easier to fly with.” Twilight lifted a brown burlap bag with two holes perfectly sized for hooves.

The pegasus reached out to grab the bag, only to catch empty air when Twilight pulled it just out of reach. “Do you promise to read the instruction manual?”

“Psh, yeah, now gimme.” Cyan hooves met empty air once more. “Come on, Twilight!”

“Rainbow Dash, this is serious! This plant could seriously injure or even kill you if you don't use it properly.” The unicorn furrowed her brow and stared down the pegasus, who merely groaned.

“Yes, mooom.” A sudden blush spread across Twilight’s face. “Wait, did you like that?”

“N-no! Take your stupid sex plant!”

The bag flew through the air, easily being caught by the athletic pegasus. “Eesh, and here I thought I was weird. I didn't peg you as the type for a mommy fetish. Yowch!”

Twilight’s horn slowly stopped glowing, a tiny wisp of smoke rising from a fresh burn spot on Rainbow’s flank.

“Jees, Twilight, I wasn't shaming anyone. You do you. Anyway, thanks for everything, but I gotta get home and try out this baby. Later!” And just like that the mare was gone, having leapt through an open window and into the noon sky.

“Make sure to read the manual!” The unicorn called out to the empty sky. Alone once more, Twilight let out a sigh and stared down at the ground for a moment before raising her voice and shouting down the stairs “Spike! Get your diaper and the rattle and get up here!”

“Do I have to? I did all my chores!” Came the annoyed response from Twilight’s adoptive son.

“Yes! Now hurry, mommy needs to have her fun!”

Within minutes Rainbow was alone in her house, having zipped back so fast nopony could see her rather shameful purchase... or at least she hoped so. Either way, it didn't matter anymore. She had her prize and she was alone. The flight over was spent imagining everything her new toy was going to do to her and, by the time she was home, she was wet and ready for her fantasy to become a reality.

Her pussy quivered and a thin line slowly dribbled down her legs. In a flash the windows were closed, the shades were drawn, and the she was on her bed. The contents of the bag have been dumped on the center of her blanket along with the manual that landed with a thump.

“Eesh, that thing is heavy.” She ignored the small package of seeds for now and focused on the safety manual, opening the page to the first chapter and skimming down the usual warnings. “Do not use if pregnant or intoxicated or yada yada. Do not use in the presence of great magical items, do not blah blah blah oh here we go! Use exactly three drops of water and an average sized pot filled with dirt. The number of drops should be three. No more. No less. Three will be the number you shall use, and the number of drops shall be three. Four should not be used, neither should two be used, except if you are proceeding to drop another in order to reach three. Five is right out.” Rainbow skimmed a couple sentences that were just as repetitive as the rest. “Jees, this is boring, I get it! Three drops that's it. Sheesh.”

The mare tossed the manual over her shoulder in disgust. With a haste borne of incredible lust, she quickly assembled the necessary ingredients, a pot filled with dirt, eyedropper filled with water and a single strange black seed. She licked her lips and sunk the seed into the dirt, hastily covering it with more dirt and counting out exactly three drops of water. “Alright bad boy, let's get this party started!”

The pegasus spun around and presented her dripping pussy to the potted plant, her face firmly against the bed. Then, she waited.

And waited.

And waited.

Until she slowly felt the arousal that had filled her begin to wane. “Augh, what is taking so long?” She spun around and glared at the now tiny plant sprouting up out of the dirt. It looked weak, and small, barely the size of a dandelion.

“You look pathetic. Maybe a little more water will speed things up.” She squeezed a few more drops onto the plant, which shuddered and grew a little faster, though not fast enough for the world’s fastest flier. “Come on you stupid plant, grow already!” Angrily she emptied the rest of the eyedropper on the plant and got back into position, plot held high.

Within seconds she could hear the plant grow, its body creaking and cracking as it was forced to grow far faster than was normal. Sparing an upside down glance at the plant, Rainbow licked her lips when she saw the first few tentacles begin to form.

“Finally, that's what I’m talking about!” The mare spread her legs wider and waited. “Breed me already, you dumb plant!”

Thankfully she didn't have to wait long, and within moments she felt the plant begin to reach out with its long tendrils and grope blindly all over the mare’s flanks and legs, slowly zeroing in on its target.

“Come on come on, fill me already! Stuff my holes so full of tentacles they come out of my nose!” She wiggled her butt at the creature, squeezing her inner walls and forcing a fresh trail to crawl down her legs, drawing the tentacles’ attention.

The second one of the green appendages touched the wet trail down her leg and began to follow it up, closer and closer where it met with its twin and nudged Rainbow’s now slick pussy. “Fuck yeah, do it you tentacle, uh plant thing! Breed me!”

She pressed her ass backwards, hoping to urge the tentacles on. However, they quickly retreated. A pained whinny escaped the mare’s throat and she cast another upside down look at the plant. “What's your deal?”

The plant had grown several more tentacles, but these were much different from the others, having large bulbs on the ends. Ignoring that part, Rainbow noticed several new, thicker tentacles had also grown. Stowing her impatience, Rainbow looked forward and bit her lip, eagerly awaiting the plunge that would signify the tentacles ramming into her holes.

Much to her dismay that didn't happen, instead the first two tentacles wrapped around her waist and bound her wings firmly to her sides. “Okay, a little bondage first. Well, whatever wets your whistle.”

The plant firmed its hold on the pegasus, squeezing the mare and ensuring she could not struggle out of its grasp. Once secure, the two large bulb-ended tentacles slowly snaked between the mare’s legs, passing by the now soaked pussy and traveling between her legs in search of a much different prize.

The bulbous heads slunk between Rainbow Dash’s legs and crawled along her belly the short distance until they found her small, athletic teats.

“Eep! I wanted you to fuck me in every single hole I’ve got, not play with my tits!” Rainbow squirmed in the plant’s grasp, but it had already wrapped another pair of thick, strong tentacles around her legs, keeping her restrained.

Heedless to the mare’s annoyance, the bulbs slowly opened and wrapped themselves completely around the Rainbow's teats, its tender petals caressing the tender flesh with its velvety softness.

“Ooh, well, I guess that is kind of nice.” The pegasus stopped uselessly thrashing against the plant and settled in, closing her eyes and focusing on the pleasurable feeling rising from her tits.

Despite the softness of the petals the creature was anything but gentle, which was just like Rainbow wanted. The instant the bulbs settled around the mare’s teats they got to work on squeezing and pinching her small mounds, catching her by surprise. Within moments her squeak of surprise had devolved into a low moan of pleasure, and the plant adjusted its rough ministrations to focus more on the small, tender nipples.

“OoOOOoo now that is good.”

All the while the plant grew larger still, wrapping the mare’s limbs completely in its green embrace until the pegasus could no longer move even an inch. Though it had, oddly enough, left the space around her belly completely bereft of restraints… The mare didn't bother thinking about it for very long though as it hardly mattered. She could finally relax and let the plant hold her, allowing her to focus entirely on the sensation of the bulbs working on her teats.

The bulbs had grown larger over the past several minutes and were now at least three times the size of Rainbow’s teats, and if she was looking, she would have noticed a small sack begin to fill with greenish liquid next to the bulb’s head.

Another twist and pull on her nipples made Rainbow’s wings twitch beneath their bindings and a moan escape her throat. I just might be getting a new fetish. She mused as she felt the plant squeeze her teats tightly.

The assault on her teats stopped without warning. The mare blinked and waited for all of two seconds. “Hey what's going on back there? Get back to wooOOORK!”

As if on cue, the plant got back to its job, but this time things felt different. Gone were the strange velvety bulbs, replaced by a wet and slimy substance that was being lathered all over her teats, including even the area around them.

“Hey, what gives?” RD tried to turn her head, but by now the plant had her completely locked in place and she stopped, a shiver running down her spine. Maybe bondage would be another new fetish of hers… this did feel amazing.

Thankfully it didn't take too long for the plant to continue its assault on the mare’s teats, this time every few seconds she could feel another squirt of something spray against them only to be massaged into her flesh where it quickly vanished. The mare either didn't care or didn't notice as more and more liquid was massaged into her tiny athletic tits, until a sudden heat and pressure began to rise from between her legs.

The mare moaned and arched her back as much as possible; she had been on the edge of an orgasm for the last minute, and the sudden addition of heat pushed her right over it. For the first time in her life she came just from the feeling of her teats being played with. The mare bucked and spasmed as her pussy squirted a thin stream of mare cum, the sheer force of her orgasm watering the plant even more, which was probably a bad thing.

Rainbow wasn't the smartest in her group of friends, or family, or really any group that contained more than four ponies not gathered from a kindergarten, but even she knew that something was wrong. The plant holding her was not the light bondage she was used to, it made almost any movement impossible, and though it held her wings down light enough that it didn't make her squirm in irritation, she still couldn't flap them

Furthering this sense of wrongness was the fact that her teats had begun to ache, the dulling effects of her own mind blowing orgasm beginning to wane and let in a slow trickle of pain and discomfort. At first it was nearly imperceptible, merely an annoyance she thought was brought on by the rough treatment her now sensitive nipples had received, but when it grew exponentially and began to feel like someone had lit a fire in her tits, she knew that she had gone wrong somewhere.

“Whoa there, stop! Uh, deactivate!” The plant ignored her, continuing to twist her sensitive niples while squeezing her teat, kneading more of the strange liquid into her flesh. “Off!” Nothing. “Uh, walla walla washington?” She didn't think that last one would work anyway.

Panic began to grip the pegasus as sure as the vines binding her body, her breathing becoming labored as her mind raced... Than she stopped and shrugged. “Fuck it, bring it on, plant thing! Do your worst, so long as you stuff me full of cum eventually. Or whatever you have that passes for cum.”

As if egged on by the mare’s words, the plant’s bulbs grew larger, becoming more defined, as if there were muscles beneath the vegetation. It stopped for a moment, readjusting itself before it began to squeeze from base to nipple. At first it was gentle, but it quickly grew more insistent, squeezing and milking harder and faster by the moment until it became a rhythmic pulse that had Rainbow Dash cumming again within moments.

The sensation of the soft petals caressing and squeezing her, heightened by the unnatural heat and slight pain made for the perfect cocktail that had the mare in bliss. “Ooooh yeah, that's goooood.”

Her tongue lolled out of her mouth, her eyes shut tightly and her entire being was centered on her tits, focusing everything she had on the mind numbing amount of pleasure. She was vaguely aware of the continued sound of growing only barely audible over the sound the plant made as it milked her for all its worth.

So far gone was the pegasus that she hardly even noticed when she felt a sudden surge of something spraying out of her breast, only the sudden feeling of slight relief alerted her to the change.

“Hey, what the heck is going on back there?” The pegasus squirmed, trying to get a better look. Thanks to her natural pegasus flexibility and good old fashioned stubbornness, she managed to loosen her binds enough to take a peek between her legs… just in time to see the translucent petals give her mounds another hard squeeze from base to tip, making a small surge of white shoot out of her teats where it was quickly caught by the plant and sucked away deeper into the creature’s still growing body.

“How did you...? Why am I...?” The mare shook her head. “Fuck it.” She let the plant guide her head back into it position. She didn't care anymore, it felt good. Twilight said it wouldn't last forever, and she had to admit that the thought of tits leaking milk was kinda growing on her…

A pinching sensation coming from her teats made the mare roll her eyes in annoyance. “What now?”

A sudden sense of vertigo accompanied by a wave of pain and pleasure shot up from between her legs. Suddenly she felt bigger, the plant creature’s grip on her mounds tighter and suddenly she felt the need to to be emptied. She grunted in annoyance, she felt so… full. Not even after the time that she had drank twelve mugs of cider did she ever feel this full. This was different, though; this was not a feeling of fullness that came from her stomach. This time it arose from her now larger teats.

More thick slime covered her teats and was massaged into her body where it quickly vanished, only further worsening the feeling of fullness that threatened to overwhelm the pegasus. The pain that shot up from her now aching teats was lesser than before and, without thinking, Rainbow Dash found herself moaning at the sensation.

She could feel it now. Her teats had grown. She didn't know how much bigger but they weren't the tiny athletic mounds they were before. Twilight said that everything was temporary, this will go away. Do I want it to, though? Rainbow shook her head and dismissed the thought. Bigger teats would be nice, at least she wouldn't be mistaken for a colt anymore... but they would seriously put a damper on her aerodynamics.

Another surge and spray, and the feeling of fullness dissipated somewhat. Not enough to go away, but now it was a pleasurable sensation. She was not overstuffed, but perfectly full to the point of complete contentment. Her tongue lolled out of her mouth as the plant continued its milking, only just barely able to keep up with the pegasus’ production.

Within moments another orgasm was upon her, and this time she did not hold back. She moaned and screamed and cried out loud enough for anypony passing by to hear. There were no real words in her cries of pleasure, only a mix of swears, mumbled thanks to Celestia, and other indecipherable yelling.

Her panting and half formed moans were the only sounds other than the soft squish of the plant still milking her for all its worth. She breathed in deeply, smelling the thick scent of sex, sweat, and a subtle smell of plant life. It smelled good to the athletic mare, thoughts of steaming locker room encounters and sweaty sessions held in the Wonderbolts’ private gym running through her mind.

All that vanished when she felt the plant stop moving. She blinked twice and waited, wondering if the tentacle monster needed a breather. After a few tense seconds she growled in frustration and twisted her head to get a better look, the plant knowing better than to fight the stubborn mare.

“Holy zombie Celestia, I'm huge!” Her teats had quadrupled in size by now, and through the petals that grew from the tentacles she could see a thin stream of milk dribbling from her swollen nipples. She gulped at the sight. “That's big enough, you stupid plant.”

She still wasn't sure if the plant could hear her, but she seriously hoped so. Her teats couldn't get any larger than they were now. Though if they did, I might finally be bigger than Fluttershy.

A sudden pressure against her nipple brought her attention back to reality, where a tentacle pressed against her still milk-dribbling teat. “What are you doing?”

Another thin tentacle pressed against her other nipple, the two muscular masses pressing insistently against her nipples. The mare grunted, an oddly nostalgic sensation coming from her nipples. It made her think of the first few moments of sex, the slow pushing of a stallion’s tip against her still tight pussy, its sheer sheer size stopping it from simply plowing its way inside and stretching her at anything faster than a snail’s pace.

Her eyes shot open and her struggles resumed in earnest. She wasn't sure how, but she knew then and there what the plant intended on doing to her and she did not like the thought of that happening one bit. Her wings thrashed, powerful muscles straining against the thick tentacles binding them to her sides. Her legs twisted and pushed in one direction. then another, trying to find a weak spot in the tentacle creature’s defences.

Her head thrashed back and forth, loosening the already lax bindings around her head. After a few desperate shakes, her head and neck was free, the creature seemingly not paying attention to her attempts to free herself. She focused next on the bindings around her right hoof, looking down and trying to figure out just how to get out of the tentacle creature’s hold before it was too late. Fate seemed to have something else in store for her as the moment she felt the creature’s hold on her limb begin to loosen she felt the thin tentacles pressing against her nipples begin to slip inside.

“Nonononono NO!”

Despite her cries of protest, the creature would not stop, pouring its thin tentacles inside her teats and forcing her already sensitive nipples to spread more and more, what little milk not extracted before now was forced inside.

Her head collapsed to the bed where she bit down on her pillow. The pain was excruciating, the feeling of her delicate nipples being forced open in order to allow access to an object far larger than should ever enter was beyond her imagination even a moment ago. Yet here she was, thin tentacles slowly pushing themselves further and further into her teats until it felt as though a knife was being pushed into both of her mounds.

A sudden shift in the plant was all the warning she received before a small squirt of liquid sprayed into the insides of her teats, making a sudden cooling feeling begin to wash away the pain. Though Rainbow Dash was thankful for the relief, she knew better than to give up her attempt to escape. She didn't want to find out what the plant had next in store for her as it had already made her teats grow, start making a truly massive amount of milk, and was now beginning to violate her teats.

By the time she worked her first hoof almost free of the bindings, the tentacles slowly penetrating her teats and squirting a strange liquid inside them began to pull out. Before she had a chance to breathe a sigh of relief she felt the tentacles quickly jam themselves back inside her.

She gritted her teeth as she felt the creature penetrate her again, than again and again. Its thrusts never picking up speed while all the while squirting a thin blob of the strange liquid into her at the end of each thrust.

She grunted in frustration. The pain had died down enough, but it was still not exactly a pleasurable feeling to have one’s tits so thoroughly violated. As she freed her first leg from the creature’s clutches, she cast a quick upsidedown glance at her teats, worried that with all the liquid being forced inside them they would balloon to an even greater size.

Nothing could have prepared her for the sight of her formerly small teats growing even larger, sections of them bulging at regular intervals as the formerly thin tentacles had grown in size, forcing her body to stretch and grow as it was penetrated by an ever larger set of tentacles. The pegasus gasped, the creature had begun to work more of the strange slime onto the outside of her teats, massaging them with the same love and care they had started with.

Her resistance wavered and, for a moment, she considered stopping her plan of freeing herself in order to merely see what this plant would do, but she shook her head. She had no time time to be curious, her tits had grown to at least 4 times their original size at this point and showed no signs of stopping. With the help of her now free hoof she gripped the tentacle wrapped around her other forehoof, trying to pry the iron hard appendage from her limb.

The creature had redoubled its defence by now and the tentacle binding her other limb had grown much thicker and stronger than the others, making freeing her limb a slow and difficult task.

She had just barely managed to begin peeling the tentacle from her leg when she felt the creature violating her teats stop. Confused, the mare took a peek beneath her legs, just in time to see the tentacles begin to shift and grow, their girth doubling and thick, bulging, almost vein like protrusions become evident all over its surface.

Her hooves gripped the sheets tightly. Though the pain had long since faded to nothing, she was still forced to feel as her nipples were forced to stretch much, much wider, making room for the now incredibly thick tentacle to begin fucking her teats as fast and as brutally as they did before.

This time, the small squirts of liquid at the end of each thrust were replaced with sudden surges of liquid that melted the cooling feeling and replaced it with a burning heat within her that grew hotter by the moment. Rainbow’s eyes grew wide and she let out a small involuntary whimper of pleasure as she felt the tentacle began to fuck her as brutally as it could.

Each deep thrust deposited another burning load within her, noticeably forcing her teats to grow slightly with each passing moment. By the eighth deep thrust she found she could no longer hold back against the waves of pleasure and despite the fact her teats had grown at least another few cup sizes. It all didn't seem to matter as much anymore; she reasoned that it couldn't really get much worse, could it? Her teats were now enormous, and she began to feel her milk production begin to ramp up once more, the now familiar feeling of tightness beginning to well within her.

Her lover was quick to take care of that however, squeezing and kneading her teats until they expelled all the pent up milk she had stored up since the tentacles had first begun to fuck her teats. She wasn't sure how this was possible as they certainly hadn't pulled out of her, but it didn't matter. Nothing really did.

Her thoughts blew away on the winds of lust and in their absence the creature’s tentacles slowly began to crawl back up and over her body, once more locking her into its loving embrace. She did not fight and she did not care, another orgasm came to the moaning mare.

She hardly noticed the first orgasm end before it was replaced by another, and another, until her existence became a continuous stream of orgasms that rolled over in waves. The tentacles seemed content with the current massive size of her teats and stopped their forced growing for now. If Rainbow Dash was capable of looking down at her teats she would have grinned like a filly. She was easily larger than any of her friends and probably even rivaled the goddess of fertility, Celestia, in size... and probably in milk production as well.

The thought would have brought a strange squeal of joy to the mare’s lips if she wasn't so busy moaning in unabashed pleasure. Uncaring if the few neighbors in earshot heard the sounds of her ecstasy. Her tongue lolled out of her mouth and her breath came in short gasps, unable to stop and catch her breath amidst the sea of constant orgasms.

The creature, meanwhile, had grown content, absorbing her milk at a steady rate and using the nutrients to finish fortifying its body, growing a long thin tentacle twice the size of Rainbow Dash’s body, though not nearly as thick as its brethren. It was joined by a much shorter but much thicker tentacle that was adorned with a multitude of bumps of various sizes. Dash neither saw nor would have cared about the recent addition to her lover’s body as the seemingly endless orgasms had tapered off and finally stopped.

“Sweet Celestia, that was amazing.” She stopped, taking a deep, ragged breath. “That was the best damn orgasm, or orgasms, I’ve ever had in my entire life. Whatever it was, it was fucking amazing.”

As she caught her breath her lover moved into position, the longer and thinner tentacle positioning near her tight anus, the shorter and thicker one hovering just outside of her dripping pussy. Mare cum dripped in a steady stream out of her cunt, the numerous orgasms producing an equally endless supply of lubricant for what was coming next.

Lucky for the pegasus the creature waited, allowing her to catch her breath and ready herself for the next stage. When the creature felt its lover begin to grow bored, it pressed forward with the thicker tentacle, rubbing it up and down her well-lubricated pussy and smearing the thick appendage in her juices.

“Ooooh, that's what I’m talking about. It's about time you got to fucking me properly... and get back to work on my tits! I don't like lazy bones.” The mare kicked her hooves the few millimeters the plant allowed, startling the creature into restarting its relentless pounding of her now well-used and gaping tits.

The creature took the hint and stopped teasing its mate, even though its very instincts cried out to continue lest her mate not be ready for what came next. Reluctantly the creature abandoned that train of thought, what little mental faculties it had were needed now.

Slowly the creature pushed the larger, thicker head into its mate’s dripping slit, the mare cum acting as a potent lubricant and allowing several inches to slide in without trouble.

A content moan slipped from the pegasus’ mouth; she was finally getting what she wanted and she could not be happier.

The thick bumps and ridges along creature’s tentacle seemed to hit every pleasure spot inside her cunt. Twisting and turning as the tentacle slid deeper inside her, driving her to another orgasm before it could even fully enter her.

“Oh sweet Celestia, that's the spot.” She gripped her sheets tighter, riding the waves of pleasure.

The thick-ribbed, headed tentacle surged forward suddenly, burying itself deeper than any stallion or dick-endowed mare had ever managed to reach. The pegasus yelped in surprise as her body was forced to stretch in ways it had never done. The creature didn't care and simply plowed onward, stuffing itself inside her until she could feel its slimy appendage thump into her cervix painfully.

The pegasus squirmed, the feeling of something pressing against the deepest recesses of her body unnerving her. Even that was washed away quickly as the nimble tentacles still fucking her tits went into overdrive, drowning any pain in a constant surge of pleasure. Within moments she hardly even cared that her cunt was no doubt being stretched far beyond what any stallion had ever done to her.

Only when she finally felt as though her body had stretched enough did the creature plunge its thin tentacle into her puckered hole. The pegasus yelped louder and instinctively tried to jump away, only to be reminded that her body was almost entirely wrapped in thick green tentacles. When had that happened? She wondered for a few seconds before simply shrugging it off. It didn't matter that the tentacles had worked their way all the way up to her chin. She was experiencing the most pleasure in her entire life.

While she was mercilessly violated by the thin tentacle, its thicker brother lay still within her pussy, steadily excreting a thin stream of liquid. A soft warmth spread from her aching cunt, easing her discomfort and pushing her further into the haze of lust.

This was what she had been looking for; almost all of her holes were stuffed full. All she needed now was something to fuck her throat and it would be perfect. She looked around, dimly aware of the thick tentacle beginning to move once more, searching for something to fill her throat. Another deep green tentacle was wrapping itself around her head when she snap-grabbed it in her teeth and pulled it into her mouth.

The creature stopped, perplexed by the actions of its lover but it adapted quickly, shifting the tentacle in her mouth into something far more pleasurable, the hard skin around the tentacle shifted into something softer and tasted less like bark. Once done it took control, plunging into the mare’s mouth and banging into the back of her throat.

Rainbow Dash moaned. It was perfect now, and all she had to do was lay back and enjoy it. The thick tentacle’s pace had grown to the point that she could hear the soft shlick as it pounded into her over and over. Her tits felt amazing, the ache that had bothered her was gone; only the mind bending pleasure of having them stuffed full remained.

Though Rainbow had always been a fan of anal, nothing she had ever done could approach the level that the creature was giving her. Each time it thrusted into her she could feel it sink deeper, pulling out only half as much as it thrusted in. Deeper and deeper it went, stretching her body with every thrust and delivering one mind blowing orgasm after another. After it plunged deeper than any stallion or toy she had ever used, she felt it stop and twitch, growing thicker by the second.

The feeling as her body was stretched wider and wider by the second rocketed her to another orgasm. She was dimly aware of the fact that she had lost count by now, that didn't matter, nothing mattered. Now as thick as its twin and three times as long, the tentacle in her ass surged forth once more and for a moment the mare panicked; when would this thing stop? Again, that thought vanished in an instant as it didn't matter.

By now she could feel the ribbed tentacle jammed inside her cunt begin to grow and thicken, becoming longer and thicker than any cock she had ever even seen. This time its growth didn't even bring an ounce of pain, all was pleasure for the ruined mare. She didn't even mind the fact that her pussy and ass were no doubt stretched well beyond what they should be. All that mattered was the tentacle.

Wanting to show her devotion, she wrapped her lips around the tentacle fucking her mouth, sucking on it while simultaneously rubbing its soft underside with her tongue, lavishing it with attention and urging it deeper. The creature needed little prompting and eagerly thrust into the mare’s throat, plunging past her tonsils and sinking into her throat a few inches,aking her throat bulge visibly through her skin as another of her holes were forced wider than they had ever been before.

The tentacle invading her ass had grown so long and thick that its trail was visible through the athletic mare’s belly, every thrust making her stomach bulge and distend as more of its body was forced inside her. If she could look at her stomach, she would have been strangely aroused by the fact that her tits had grown so huge they would brush her knees when she walked. Though more arousing would be the fact that the huge tentacle in her pussy was visible through her skin as well, its sheer size making it easy to pick out as it plunged in and out of her. Even her teats were not safe from this disturbing sight, thick tentacles barely visible as they made her tits bulge with each thrust.

With loving attention the mare sucked on the tentacle plunging down her throat, uncaring to the sudden lack of a gag reflex. Unaware to the changes her body was being forced to undergo without her knowledge. All she knew was how good sucking on this tentacle was. She had never really enjoyed giving blowjobs before, doing it only when her partner had performed particularly well. Now though, now it felt as though her mouth and throat were a second pussy. It had never felt this good to have her throat so violated, but now she almost came every single time the tentacle pulled out of her throat only to plunge back inside.

She would have moaned, screamed in ecstasy loud enough for the neighbors to hear, but the creature burying itself in her throat made that impossible. The fact that the same creature was simultaneously fucking all of her holes and her tits made any rational thought impossible. Time blurred and only the tentacle mattered. She could feel the one that entered her ass continue to push through her insides, stretching her body and forcing her it into a shape that would better please her lover.

She hardly even noticed the orgasms anymore, they were so constant that their arrival and departure were mere afterthoughts. A sudden shift broke her reverie as the tentacle occupying her pussy slammed hard against her cervix. An hour ago she would have cried out in pain at such an act, but now it hardly seemed to matter. Everything the creature did brought a new horizon of pleasure Dash had never dreamed existed; why would this time be different?

Another deep thrust forced her womb open slightly. Though it was not enough for the enormous appendage to enter, it was a start. The rest of the creature seemed to know instinctively how much this would normally hurt as it began to pour a dulling chemical into Dash’s body through every hole it occupied, ensuring its lover would not feel an ounce of pain.

After a few more powerful thrusts Dash could feel her womb be forced open by the insistent creature, its enormous head stretching her cervix to the point that she felt a sliver of pain even through the enormous amount of chemicals flowing through her system. In an instant even that was gone. The tentacle pushing into her womb didn't feel like anything Dash had ever experienced. It was painful, yes, but she knew that would go away. Maybe it was the creature but it also felt... right.

This is what getting bred must feel like. She moaned at the thought; this creature probably couldn't knock her up, but it could fill her womb and make it feel like it had, and that's all that mattered to the lust-crazed mare.

This was how it should be, how it should always be: her womb stuffed full while the rest of her body was used for her lover’s pleasure. Her eyes rolled back into her head, she knew then and there that she could never truly go back to a pony lover. She had suspected as much when she felt the mind bending amount of pleasure she received just from having her tits fucked, but this sealed it. There was no going back for her now, not after she learned just how much she had been missing out until now.

After it worked its way all the way into the mare’s womb, the creature began its rhythmic thrusting, never pulling all the way out of her womb until it was sure that her body had grown used to the abuse. Once complete, it thrusted one last time, as deep as it could go, until even her womb was forced to stretch and distort from the impact.

“Mmmf!” She cried out in satisfaction. Just a few moments longer and she would finally be able to feel the hot warmth as cum filled her womb.

There it stopped, only for a sudden blob of liquid to begin traveling up the tentacle. the sheer size of which made it bulge obscenely as it traveled up the thick appendage. The moment Rainbow felt the bulge enter her, her eyes snapped open in surprise. Sure, she had been stretched to a size that ensured no ordinary stallion could ever please her, but this was insane. The creature was indifferent and pushed on, the bulge travelling up the rest of the way and shooting into her womb. By the end of it Dash came again, the feeling of being stretched coupled with the sudden spray of liquid into her womb driving her over the edge once more.

This was exactly what she wanted, what she had always wanted: to be fucked and used, and then receive load after load into her womb, knocking her up and making her womb grow.

She hardly even noticed the tentacle changing shape and plugging off her womb, ensuring every single drop of the strange liquid would stay inside her. She wouldn’t even care if she did notice. Her body was forced to adapt once more as her womb ballooned in size so much that an outside observer could see a slight bulge the size of a cantaloupe through her stretched belly. She could feel it grow and she didn't even need to see her belly to imagine its massive size.

Dash hardly had a bit of time to come down from her last orgasm when she felt something strange begin to happen. The tentacle inside her ass pulled out slightly more than the usual only to slam into her with far more force, plunging the invading tentacle deeper than Dash had even imagined possible. With that one last push the tentacle pushed into her stomach.

The feeling was a bizarre one but it was quickly ignored, the tentacle wanted it, thus she wanted it. She felt the the thrusts into her ass continue, every one pushing the tentacle deeper and deeper until it began to slide up her throat. Deftly the creature removed the tentacle in her mouth, replacing it with the one that had borrowed through her entire body, ensuring Dash’s throat was not left empty for even a moment.

The pegasus whispered a silent thanks, the mere thought of one of her holes being uncopied bringing a shiver of anxiety to her, and without missing a beat she sucked in earnest at the new tentacle now pushing up into her mouth and between her lips.

The realization that she was now stuffed all the way through her body was a rapturous one and she came again at the mere thought. She had been made into an object of pure pleasure at the whim of the creature and her entire body would be molded to better suit it.

Even with her womb plugged shut and a tentacle going right through her entire body, the creature did not stop pleasuring her. The thin tentacle grew bumps and ridges like its twin and its thrusts grew shallow but no less pleasurable. Even her throat was not exempt from this treatment, and every brush of thick bumpy tentacle against her throat sent a shiver of pleasure down her already pleasure-wracked body.

The tentacle plugging her womb was no exception to this and, despite the fact that it lost some mobility when it had plugged her cervix. The ridges grew larger, the pleasure they gave became more intense and the tentacle flexed and thrusted as best it could, ensuring there was no break in the endless sea of orgasms Dash found herself lost in.

After several more minutes she could feel the tentacle in her womb begin to shift and grow once more, sprouting smaller, thinner tentacles that pressed against the inside of her bloated womb. The dexterous tentacles spread out, pressing and pushing against her insides, which felt amazing to the pleasure-addled mare who moaned at the sensation.

After the tentacles searched for a few moments longer they seemed to find their targets and surged deeper. Not much could have cut through the haze of unending joy she felt, but the sensation of something burying into her ovaries was one of them. Her eyes shot open and she instinctively leapt away, trying to make the strange sensation stop, only to make it mere centimeters before the creature pulled her back in.

It took a few more seconds of struggling before it began to feel good, and another wave of chemicals to knock out her desire to stop. Once more sedated the mare quickly settled back into her now usual position; she loved the tentacle creature and it had never hurt her yet, why would it start now?

Her trust was vindicated when she felt a new and strange sensation reach her brain. The tentacles fucking her ovaries felt good, incredibly good. All of her holes, every nook and cranny of her body was made for the tentacles’ pleasure. The creature was her master and her body was its to claim.

She felt another tentacle press against her lips and, without thinking, she opened her mouth enough to allow it entry where it quickly slid to the back of her throat and pushed on. A garbled moan of thanks was all she could manage before she felt the new tentacle plunge all the way into her stomach where it stopped.

She hardly spared the new tentacle a thought. Even if it stuffed another ten inside her, she would not complain. Even when the new tentacle began to bulge with thick fluid, forcing her throat closed as the massive loads traveled into her belly, she didn't complain. When her stomach groaned and stretched, the creature forcing her belly to grow and stretch as its contents pushed against its walls, she didn't complain... for now she was full.

When she felt the tentacle fucking her womb and ovaries begin to pulse as well, filling the rest of her body with its strange seed, she didn't complain. Every hole was its to fuck every empty part of her body was its to fill. There was no pain as she felt her stomach and womb grow larger by the second, growing to the point that she looked pregnant with triplets. The only way it could have gotten better is if she was actually knocked up and filled with foals. By now, her athletic form was ruined and her body would never be the same, but even the fleeting realization that she would never be a Wonderbolt wasn't enough to jar her from her trance.

Her teats had ballooned far beyond what should be possible for a mare her size, hardly noticing as the tentacles still fucking her teats began to deposit load after load inside them. She didn't know how big they had gotten, nor did she care. Only after many minutes did the creature’s cum stop, leaving her bloated and enormous, her belly and teats would have barely touched the ground if she was not bound to the bed.

Finally it stopped, its tentacles stopping their movements for the first time in what by then had been hours. Rainbow Dash caught her breath and reveled in the break, but it was not enough; it would never be enough. She needed more, and only the fact that the creature had not pulled out of her had enabled her to hold on to hope.

Lethargically, the creature slowly picked up its pace once more, and Dash let out a squeal of joy at the sensation. That had only been round one for the creature, did that mean it had more rounds of pleasure in it? Just how much of its strange cum did it have? How big could it grow? How long would it last?

No matter how long it had, Dash was determined to enjoy every last second of it.

Twilight Sparkle grumbled as she flipped through a large keyring. All around her the sights and sounds of the Everfree, that would normally put her on edge, were now ignored. She had been forced out of a perfectly good book just to go chase down Rainbow Dash’s errant house that had apparently come loose of its mooring and floated out over the Everfree.

Finally finding the key she needed, she looked up to where a familiar cloud house had gotten stuck on a massive tree which stuck up through the canopy of the forest like a great spear attempting to reach the heavens above.

She should have been happy that it had not drifted further, but she was still pissed at having to drop her favorite book at the best part. It had not been easy tracking down and purchasing a fanfiction that involved the princess, which was only made doubly more difficult when it was one of those fanfictions. Why, it had taken her months just to get her hooves on it, and now Dash had to go and forget to anchor her house properly!

Applying the cloudwalking spell quickly she continued to grumble. Why when she gets her hooves on her, she best be ready for quite an earful! With a flash she was on the porch of the cloud house. I mean, come on it’s a cloud house, anchoring it properly really isn't that difficult!

Twilight shook her head. How hard could it possibly be, anyway? She quickly inserted the key and turned the lock, walking into the interior of the cloud house and firmly closing the door behind her.

Once inside, she took a step forward only to stop when an odd smell reached her nose. What was that? It smelt strangely like a pine tree, but even that wasn't quite apt. It left her nose with an odd, tingly sensation. One that reminded her of what it smelt like after expending a lot of magic. Her nose crinkled in disgust, beneath all that she could smell the reek of sweat and wet fur. Did she forget to shower again before passing out?

“Rainbow Dash, are you there? It's me, Twilight! Your house floated over the Everfree, is everything alright?” Only the sounds of the forest below answered Twilight’s call.

Shrugging to herself, Twilight walked further inside, figuring she had probably done as she assumed she had and probably passed out somewhere for a nap and forgotten to anchor her house.

As she got deeper, the smell grew more and more pungent, and by the time she reached the stairs she had to quickly whip up a spell to block out the stench. It smelled worse than the time Rainbow had tried some crazy new workout routine and didn't shower for a week.

Her hooves reached the top of the steps and then stopped. What was that sound? She leaned towards the hallway, her ears standing up.

“Oh fuck yeah right there, don't stop!” Cried Rainbow’s familiar voice, though it was marred somewhat, as if she had something in her mouth while she was talking.

Twilight rolled her eyes, the thought of walking in on her friend while she had sex with her new toy wasn't exactly pleasant, but the unicorn was too pissed to be nice right now. Maybe a little embarrassment will shock her out of this irresponsible streak.

She smirked, making her way over to the door only to stop once more. What was that horrific squelching sound? It was like someone was continually pushing their hoof into mud only to rapidly pull it back out. Twilight didn't want to think about it and shook her head, Rainbow always had been the most shameless of her friends after all.

She threw aside the door and stepped inside. “Rainbow Dash, your house is over the… wow.”

When Twilight had braced herself for whatever disgusting thing Dash had gotten up to, she had not expected to see this.

Rainbow Dash had lost the restraints on her body for they had long since been rendered moot by her addiction to the creature, and then doubly moot when she was no longer able to move. Her teats had grown obscenely, becoming easily larger than any other teats Twilight had ever seen, real or drawn. Which was saying something as the collection of magazines she hid under her bed was as extensive as it was depraved.

The sheer size was amazing, growing to the point that they rested on the ground even if she was standing, assuming she even could accomplish that. More disturbing than the size was the fact that they bulged and squirmed as a multitude of… things moved inside her teats, and not only was this true for her teats, but her stomach that had grown to the point that her hooves no longer touched the ground seemed alive. It was as if she had swallowed hundreds of snakes that were trying to escape her body.

Gone was the sleek athletic rainbow Dash Twilight had known, replaced by a monstrous mare that seemed more like a cow than a pony. The most disgusting, however, was the massive pulsating mass of tentacles that had grown to the size of three or four ponies, its long limbs pistoning in and out of every one of Rainbow’s holes, including her tits.

Twilight stood transfixed in a mixture of morbid curiosity and arousal the entire time, and Rainbow Dash didn't even notice her presence. Her hips bucked back against the thrust of the eight, or was that nine tentacles stuffed into each of her holes? Twilight didn't feel like counting them.

Suddenly the enormous mare stopped and began quivering all over, her eyes popping open as she cried out in ecstasy. “Fuck yeahhhhhh.” She mumbled incoherently.

Twilight was fully aware of the fact that Rainbow’s stomach seemed to pulse and grow another few inches as more of something was forced into the mare’s distended body.

The unicorn sighed. “I thought I told you to read the manual you, dumb ass.”

The pegasus blinked, then looked over to the door where Twilight stood. “Twilight?” She asked through a mouth full of tentacle.

“Yeah, I'm here, Dash How much water did you give it?”

“Uh, a lot?” The pegasus winced at Twilight’s glare.

“You definitely overloaded it. I should probably get you out of there before you get stuck that big.”

Rainbow Dash didn't seem to care, merely shrugging and turning away from the unicorn to continue sucking on a new tentacle that shoved its way into her mouth.

Sighing to herself, Twilight thought back to the proper spell that would get her friend out of the predicament she found herself in. Simply teleporting the creature away could work, but that would take a lot of calculations, or drawing a couple runes. Either way, both sounded like wastes of time. Now that she thought about it, she didn't really feel like getting rid of it at all. Rainbow may have become a bloated mess, but Twilight could tell that the mare was experiencing a mind blowing amount of pleasure, and the only time she had ever indulged in using the plant was on the lowest setting… maybe it wouldn't be as bad as it looked.

Twilight shook her head, dismissing the naughty thoughts. She needed to get rid of the plant here and now; it was affecting her judgement and if she had to guess, there was probably a thick layer of pheromones that she couldn't smell.

With the perfect spell in mind, Twilight powered up her horn and leveled it at the creature. Just a few more seconds and the plant monster would be compost. Or at least it would have: if she hadn't been so busy staring at Rainbow Dash’s altered body, she would have noticed a rather sneaky tentacle sneak around her, its body growing in the nooks and crannies of the cloud ground, unseen by all save the most attentive eye.

Mere moments before Twilight’s spell would have been completed, the tentacle shot forward, burying itself in the unicorn’s moist cunt, shocking her out of her spell.

“What the fuck!?” The mare screamed, leaping into the air in a panic.

The tentacle wasted no time, grabbing her horn, wrapping a few tentacles around her forehooves and dragging her closer. Within the few seconds it took for her to reassess her situation and begin to channel another spell, she was already drawn deep into the tentacle’s embrace, hundreds of slimy limbs crawling all over her body and gripping her limbs.

In her panic, she lost concentration on her smell negating spell, and took a deep, unfiltered lung-full of potent pheromones. By the time she took a second shuddering breath it was already too late, the powerful aphrodisiacs the creature produced taken her from being mildly aroused to the worst heat of her life.

And just like that the door to the pegasus’ room closed, and Twilight Sparkle succumbed to the creature’s lust.

Author's Note

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