Festival of Fertility

by PhenBird

Rating: mature
Tags: Fetish, Rainbow Dash, Rarity, Sex, Twilight Sparkle, Anthro, My Little Pony: Friendship is Magic, Alternate Universe, Porn
Length: 5700

Dashie makes the mistake of thinking herself the most hung mare in the festival. Rarity and Twilight corrects her.

A silly excuse of a story for some hypersmut where a brash Dash finds out that she's not the only overendowed girl in her little friend group. Who will take the victory in the yearly fertility festival's cum-petition?

Tags: Hyper Herms, Futa, Macro Cock Growth to Landscape-Altering Levels, Breast Expansion, Multi-Cock, Cum-Flooding, Teasing, Unfairness, Size Humiliation.

Inspired by Frostbound's excellent work.

Published 2022-02-21 04:40:00 UTC
Last updated 2022-02-21 04:40:00 UTC

Festival of Fertility

“Heaviest cock? Biggest cum loads? This is gonna be the easiest win of my life!” Rainbow Dash grinned, taking her eyes off the big poster at the information booth to turn back to her friends.. “I love the Festival of Fertility. I was, like, born for it!”

“They’re not measuring the size of your ego, dear.” Rarity said with a mild smile.

Twilight glanced between her friends, wearing a somewhat worried expression. “Now, now. We’re here to have a wonderful day, no need for any unpleasantness.

“No offence taken. If there *is* an ego competition, I’ll be happy to go home with three trophies instead of two.” Dash laughed. “I’m gonna zip over and sign up immediately. See you there, losers!”

As the baby-blue pony disappeared into the crowds, Rarity and Twilight exchanged a knowing glance. Rarity laid one hand on her skirt and allowed herself an indecent smirk. “You know what? Dashie has the right idea. I think I shall sign up as well.”

“Rarity! You can’t!”

“She has to learn some time, dear. Or we will hear her boasting until we are old and grey.”

“I suppose. It is a bit grating.” Twilight bit her lip. “Ah well. I guess it’s time.”

*** The First Challenge ***

The festival grounds were huge, filled with entertainment and good food and drink in vast quantities. Ponies from all walks of life were in attendance, drifting this way and that. Given the large population of hypers and the casual attitude towards sexuality that it brought with them (by necessity - no place for prudes when the failure of a button could let loose many pounds of cock or tits in any social encounter), it was inevitable that their prowess would be tested in the more lurid sections of the festival. And so it was that Rainbow Dash strode forward, out into the little arena that had been built with wooden scaffolding leading up to a series of massive, open tanks that had been dug into the dirt so that the competing ponies could cum into them from ground level. The seating space was barely a third full, but new spectators arrived continually after having made a detour to the nearby concession stand. Truthfully, the whole setup was simple and a bit rickety - the only piece made to last were the steel tanks, designed to withstand great forces from sheer necessity.

“First in line, huh?” Dashie said, rubbing her hands and looking at her audience. “That’s fine. No performance anxiety here.” She grabbed her top and peeled it off with a grin, enjoying the feeling of decompression as her seemingly flat boobs slid free and rapidly expanded, decorating her lithe frame with a bust like a pair of beach balls. They jiggled violently at the decompression, squishing together as she flicked one fat, can-sized nipple.

There was a murmur from the audience, going “Oooh.”

Dash’s grin widened. “That’s right. And the best is yet to come!” She removed her pants next, giving a little coo as her ass and thighs filled out next, changing from her regular, super-athletic build to something much curvier, much bigger. Of course, her heart-shaped ass had a hard time competing for attention with the immense cock that swung out in front of her, dark blue sheath clearly wider than her own waist and wrinkled as all hell. Even with a few dozen feet to the spectator stands, everybody got a whiff of her powerful scent. Her balls hung low, impossibly fat and brimming with marecum. Thus liberated, the rainbow-haired pegasus bowed theatrically at the audience, if only to make her body jiggle and slosh to indecent levels.

“Dashie! There you are.” Twilight appeared, huffing and puffing as she dragged herself into the arena. “Sorry, I was… There’s… Phew, I’m really out of shape.”

“Twi? What’re you doing here?” Dash wrinkled her forehead. “Kinda in the middle of something here.”

“I know! That’s why I rushed! I’m the designated judge for the contest.”

“*You?*” Dash regarded her critically for a moment. “I wouldn’t have thought… Ah, but you probably know the rulebook of every contest here. Yeah, sure, that makes sense.”

“She’s also competing.” Rarity said, making her entrance and joining the other two. “As am I.”

“You’re competing?” Dash frowned. “But why? You know I’m way bigger than you.”

“Yes, you’ve told us all all about your... capabilities. But maybe I’ve caught you on a bad day?” Rarity smiled significantly at the hyper-hung pegasus. “Even though you certainly look impressive. Forgive a lady for wanting to take her shot, dear. You had best get started, a line is forming.”

Twilight’s horn glowed with magic. “Don’t worry! I’ll be measuring every drop of semen for an accurate count in case of doubts. I’ll judge fairly, no biases here!”

Dash’s gaze passed from Rarity to Twilight and back again. “No sweat. I can see that our beloved Seamstress has put you up to this, Twi. Don’t feel too bad when you go for it - it’s about the participation, not about who wins, right?” She broke into a grin. “Because the gold medal is mine no matter how you slice it.”

“If you cum the most, yes!” Twilight nodded diligently.

“‘When’, Twi. You mean ‘when’.” Dash turned with an indolent smirk and rubbed the base of her sheath, pointing her tremendous marehood towards the first tank. Her cock started to erect, pushing out into the open, slick and wet, glistening in the warm sunlight. “Enjoy the view of the most hung dickmare in Equestria jacking off, you lucky few!” She called towards the stands, laughing. Certainly, the smell of her musk only grew stronger as a thick stream of clear pre poured from her cock like a running faucet, slathering the wooden planks and the dirt below and washing off the dust.

“Yay! Jacking off!” Pinkie erupted from the audience, her cry carried on the wind. Somewhere nearby, a similar, but conversely calm cheer echoed the sentiment.

“She’s really gotten full of herself.” Twilight whispered to Rarity, standing by the wooden boards separating the arena from the stands. “I swear, she didn’t used to be that far up her own ass…”

“It’s why we have to take her down a peg, dear. Teach her about her place in the real world.”

Rainbow Dash continued, making a show out of it. Her rainbow-colored armbands quickly became dark and matted with goo, as the stream of precum quickly turned to the real thing, gushing in harder and harder spurts. “Whoops! Gotta aim it right.” Dash laughed, hefting her fat, throbbing cannon into the polished steel of the storage tank. Her shaft was clearly bigger than the pegasus herself, reaching just past 9 feet of immense dickmare meat. “There we go, girl. You’ve been growing so nicely.” She cooed, squeezing the erect log.

“50 liters. 100 liters. 200. 300…” Twilight counted out loud, horn glowing.

Rarity allowed herself a giggle. “She looks so proud.”

The sounds of gushing, throbbing and moaning dominated the soundscape, the workings of a hyper-hung herm captivating the audience. Dash gave into the whims of her body, one hand sinking deep into her heavy tit and rolling her nipple while the other caressed the base of her commandingly huge cock. Thousands and thousands of liters of pungent, virile dickgirl jizz poured into the sunken cylinder with terrifying force. After several minutes of exertion, the flow came to an end and the now sweat-soaked Dash turned back to her friends, blissed out on the afterglow of her massive orgasm. “There we go. Tank… Filled”

“One million liters!” Twilight beamed, gesturing at the tank which all but overflowed with cum, a few errant splashes by the edge now drying in the sun. “Approximately the volume of one olympic swimming pool. Well done!”

Rarity gave the pegasus a look. “Are you done?”

“Eh?” Dash blinked. Her head felt like it was full of light, too buoyant to easily settle and return the alabaster mare’s gaze. “I filled the tank. Overfilled, even. Yeah, I’m done.” She glanced back to confirm that this had indeed happened, then turned to Rarity once more and scratched her balls, now sagging considerably less. “Nobody else ever gets even, like, half full.”

“Then I surmise that I am up.” Rarity’s head rotated briefly towards Twilight, getting a nod, then back again. “Excellent. I’ll be delighted to show you what I can do, dear Dashie. Stick around, maybe you’ll learn something.”

Dash started to smirk, shaking her head slowly. “Man, *someone’s* got a big head all of sudden. Well, good luck, Rarity.”

“It’s not my head that’s big, dear.” Rarity stepped forward and adjusted her tight, hip-hugging skirt. “And I certainly don’t need luck to teach you a lesson.” In one fluid movement, she removed her skirt, pulling it off like a magician might remove a tablecloth. But the real magic trick was how she had worn it in the first place.

Rarity’s marehood struck the ground with a seismic shock. Alabaster white skin exploded forth from her loins in a flash, a sheath the size of a whole carriage tumbling forward, balls rising up behind her like a pair of inflatable boulders that sloshed and creaked so loudly that for a moment, even the spectators in the furthest seats couldn’t hear each other over it. And then came Rarity’s cock, spooling out of her sheath by the foot. Dozens upon dozens of feet long, fat and entirely flaccid. In an instant, Dash’s overpowering scent had been reduced to a minor note in a symphony of sexual musk emanating from Rarity’s crotch.

The whole arena went quiet. Except for the aforementioned cacophony of straining, growing flesh, of course.

“Like I was saying…” Rarity said, seizing the moment as she smiled at Dash. “I don’t need your luck.”

Rainbow Dash, naturally, stared. Gawked, really. Her eyes went up, down, sideways, the other sideways, and round again. She was faced with so much porcelain-white pony dick that she had to move her neck back and forth to comprehend it all from such a close distance. A low gurgle came from her throat, words failing to form.

“Uh, Dashie… Are you okay?” Twilight asked, looking concerned.

Rarity’s smile turned cruel. “I’m sure she’ll be fine, dear. She’s just coming to terms with seeing a real lady in the nude.”

That broke the spell. “What the hell?” Dash blurted, taking several steps back as she shook her head. “What is… This?” She gestured wildly at the fat slab of pony dick in front of her, filling her ears with the sounds of throbbing, pulsing excess.

“A superior penis, dear Dashie. Belonging to a better class of dickmare.” Rarity placed one hand daintily on her crotch. The delicate gesture provoked another surge as her massive marehood started to erect, lengthening by dozens of feet more. “Ah, but there’s a contest to win, isn’t there? I just need to fill up one of these cute, little tanks?” She smirked. “I’ll be surprised if one can even hold my precum.”

Dash watched in mounting horror as Rarity maneuvered her shaft, disgorging such a ridiculous gout of clear goo that the first three tanks were instantly overflowing. And then the real thing came next, shooting fat wads across the arena. She hardly needed to aim with the volume she dished out, but being prim and proper, she used her magic to move her 100-foot cum-cannon to each open tank in turn before the whole arena flooded.

“A strong start from Rarity with 20 million liters filled! We seem to have run out of tanks, but not to worry, I can still keep the count.” Twilight said enthusiastically, even as the cum overflow gushed out through drainage canals all around the arena. “40 million liters! 80 million liters! 160 million liters!”

“Twilight! This can’t be right - she’s cheating!” Dash insisted, shifting uncomfortably as the alabaster pony’s cum flooded past her shins as it rushed off. “This isn’t natural at all. She must be using magic to somehow boost herself!”

Twilight raised an eyebrow and slowly turned to Rarity. “Is that true? Have you enchanted yourself?”

Rarity smiled, acting coy as if she was not attached to the wall of ivory mareflesh. “It’s not polite to ask a lady about the spells she keeps on herself.”

“I knew it!” Dash blurted out, pointing a finger at Rarity. “She’s totally cheating!”

Twilight frowned. “Rarity…”

The purple-maned pony gave a dazzling grin. “It’s fine, dears. Dash, if you’re *sure* you want me to remove my spells, I shall of course do so. Fair’s fair.”

“Yeah, of course!” Dash rejoined without a moment’s hesitation.

“Good.” Rarity answered. Her grin grew wider as she raised one hand to snap her fingers. “I was starting to feel really cramped with my limiter on.”

*Snap*

A burst of magic popped like a soap bubble around Rarity’s immense marehood, shimmering briefly as her gargantuan cock surged bigger with such a sudden spurt that it created a sonic boom, the very earth trembling below her. The 100-foot shaft more than doubled in the blink of an eye, and kept on going, hitting a mighty 400 feet length - and never even broke her stride, still launching massive ropes of tar-thick cum through the air, splattering onto the fields behind the arena like artillery shells. Rarity’s balls, maneuvered behind her, rose far above the lady herself, two hills of virile seed that sloshed with an almost menacing volume at Dash, utterly contaminating the air with her domineering musk.

The blue pegasus gave an involuntary shiver. Her mouth felt dry. “How are you not..?” She said in an uncommonly quiet voice.

“Shrinking? Oh, that’s easy, dear.” Rarity replied, one hand lovingly stroking her sheath as it continued to grow and disgorge more cock. ”It takes a lot of spell-weaving to keep my endowments in check, so as to fit in polite society.” She giggled demurely and smiled slyly at Dash. “Surely you didn’t really think that a paltry 100-foot length was my true size? Dashie, dear, that would have been *pathetic*.”

Dash opened her mouth to reply, but she was interrupted by the strongest growth spurt yet of Rarity’s decompressing cock. It roared into the quadruple digits, as much a part of the landscape as anything else by now - only by careful maneuvering of her towering, alabaster lady-nuts did she avoid crushing the arena stands, though the first couple of rows were still in the splash zone of errant cum and ball-sweat.

“1 billion liters!” Twilight cried out excitedly, horn glowing faintly as she counted the flood as it sprayed out far beyond the originally prepared storage tanks. “And still accelerating!”

“Of course I am, dear.” Rarity said. “And think of how much I’ll be cumming once I’m done decompressing. I’ve got a *long* way to go, after all.” She aimed a grin at Dash and slapped the side of her monstrous scrotum, making the towering orbs wobble, sloshing oppressively like crashing waves of a stormy sea.

Dash took a step back, half-expecting Rarity’s orbs to roll forward and catch her under their bulk. “You can’t be serious! How much more are you planning to grow?”

“Decompress, Dashie. I haven’t reached my true size yet. *Then*, maybe, I’ll consider growing some.” Rarity gave a light shrug. “Honestly, it’s been so long since I let myself all out, I’m not sure how grand my endowments have become, these days. Judging from the pressure in my loins, I’ve got plenty left to go.” True to her word, her cock blew past 2000 feet and kept on mounting up, pushing longer and wider out of her sheath with every beat of her heart.

“You’re gonna be - like, 100% cock! Rarity, this is crazy!”

“Ah! Thanks for reminding me, dear.” Rarity smiled and looked down over herself, her shirt still prim and proper while her round bottom was bared for all to see. “The contest is all about cum, but since the time for propriety has long passed, I might as well indulge and let it all out. After all, I wouldn’t want you to labor under the delusion that you’re the most womanly of us, either.” She snapped her fingers and a magical shimmer popped around her hips, which immediately started to widen, to swell as her ass and thighs joined in and plumped up. In moments, her more modest curves rivaled those of the blue pegasus’ and kept on adding more round, pleasant mass to her trunk.

“What? No, I didn’t ask you to do *more* growth!” Dash snapped, frowning hard.

“Too bad!” Rarity giggled, shaking her backside as it grew big enough to fit a whole sofa by itself, the marshmallow-soft cheeks clapping with the motions. “Not much use for my top, either.” She mused, unbuttoning her shirt. The very instant that they were free, her tits swung out into view, going from mere handfuls to beachballs, soon swelling big enough to hang to her hips as perfect teardrops. “There we go.” Rarity cooed, giving her boobs a gentle squeeze as they grew big enough to dwarf Dashie’s bust by her nipples alone.

Dash stepped back as her competitor seemed to disappear into her own curves. “You’ve gone crazy. This is totally crazy. Twilight, we have to do something. Help her get back to her regular self.”

Twilight hesitated, looking between the two of them. “Maybe…”

“I’m *just* fine, dears.” Rarity insisted. Somehow, she was able to move just as gracefully as ever, despite her ass and tits each growing big enough to crush a bus. They were downright modest next to her overwhelming marehood, though, cock finally reaching the 1 mile mark with a shuddering throb as it submerged the faraway farmlands under a lake of endless shestud sperm. “It feels so liberating to not be cooped up. You really should try it!” She gave a wicked laugh. “Oh, I’m sorry, Dashie - I forgot, you *can’t*. See, I hope you take this lesson to heart, dear. You’re *not* a big girl. Don’t go boasting all the time.”

Dash tightened her hands into fists. “I’m plenty big. Just because I’m not smothering all of town doesn’t mean…”

“Dashie, please.” Twilight interrupted. “She has a point, you know.” She gave Dash a hopeful look. “Maybe just... Chill out a bit more about your size?”

“You’re taking *her* side?” Dash said, exasperated. She gestured at the wall of flesh that was Rarity, cock and balls carving the area into two with no hope of looking past her. “Rarity has turned herself into a living dick and you think I should listen to *her*?”

“Don’t forget about my curves.” Rarity corrected her with a playful tone, stroking her tits as they kept on decompressing, rising up in front of her. “Forget it, Twi. Words aren’t enough. Say, why don’t you take your turn in the contest? Honestly, I’ve lost track of how much I’ve been cumming-”

“958 quadrillion liters!” Twilight quickly interjected.

“- and my orgasm isn’t going to finish for hours, anyway. No reason to hold up the contest for that long. It’s not like Dashie over here has a chance cumming enough to rival a droplet of mine, even if we gave her all year.”

Dash stuck out her tongue. “Blah blah. Just because you found some twisted sort of magic to mutate yourself with…”

Twilight looked thoughtful. “I guess you’re right. It’s not like the tanks are much use now, under your bulk, so I’ll just be keeping score myself.” She glanced over at Dash. “Is that okay with you, Dashie?”

The pegasus shrugged. “Rarity here looks to be making a new sea by herself. Is there even any point in continuing the contest?”

“There’s always second and third place.” Rarity laughed.

Twilight walked up next to Dash, looking over the ground to find a steady footing in the overflow of cum that had filled the ground for miles around. “I’ll take my chances.” She gave a little smile and unbuttoned her tight, black pants, which came off and left the purple pony’s polka-dotted underwear exposed. Twilight grabbed the waistband, pulled down and -

Cockflesh *exploded* into view. Too fast to see, too much to handle. In a second, a sheath as long as a bus and even wider than its own length lay in front of Twilight. Her dusky, purple balls rose behind her, touching Rarity's looming pair, and trapped Dash between the two, bigger ponies.

Dash nearly had a heart attack, too stricken to even react to her confinement between the white and purple walls of flesh.”You’ve *got* to be kidding me!” She cried.

“Oh, wait a moment. You haven’t even seen the good part.” Rarity mused.

Twilight sunk her hands into the base of her wrinkled sheath. Her cock, fattening with every passing moment, pushed free with a wet squelch and hosed down the side of Rarity’s mile-spanning rod with a burst of cum that could’ve filled the storage tanks ten times over.

Then… It happened again, somehow. A purple cock appeared from within Twilight’s sheath, racing to catch up to its sister. And another. And another.

“What in the world..?” Dash gasped.

“I know, right?” Rarity said. “It’s enough to make a girl jealous.”

Twilight’s mild face turned crimson with the sudden relief and pleasure, giving a low moan as her sheath and balls continued to blow up. Two more cocks slid free in the time it took her to regain the power of speech. “Just need a moment to compose myself. I’m… H-ah, I really haven’t let go in a while.”

“We really ought to, more often. It feels so much nicer! Say, I could even start a fashion line about…”

“Twilight!” Dash interjected with sudden concern. “What’s happening to your balls?”

All three of them looked back at the dark purple boulders behind Twilight. They were a far cry from Rarity with literal miles in circumference (since obviously, no part of her had stopped getting bigger), but they still cast a shadow over the trio and the rest of the arena besides. A line had formed over the taut skin of her scrotum, digging into her flesh, as if someone had hooked an invisible rope around her fat nuts and tightened it.

“Oh, that.” Twilight said. “They’re lagging behind a bit. Don’t worry about me, but thanks!”

“Lagging behind - what?” Dash said, with growing urgency. “Twi, it keeps getting deeper! It’s like it’s going to cleave your balls into two!”

Which was exactly what happened. Twilight’s scrotum divided into two - forming four separate testicles. Which wasted no time in instantly *bwoomphing* up to their previous size and then kept on growing even bigger. “Ah!” Twilight moaned sharply, closing her eyes as the four split to become eight, piling up in a mountainous heap behind her. “There we go. Feels much better!” Twilight ventured a little smirk at Dash, the relative coyness of her demeanor in sharp contrast with her bodily display. “Still think you can get more than a third place in cum production?” She asked, rubbing one of her boulder-like balls as they split into 16, then 32, big as houses.

Dash scowled and sent a side-long glance up at Twilight’s taut, towering scrotum. “You gonna keep doing that?”

Twilight shrugged. “No idea. Like Rarity, I must confess that it’s been a while since I let it all out. I’ve been growing more balls daily since puberty, but the growth gets kind of… Aggressive, when the girls don’t get relief.” She smiled without a shred of concern as her nuts went into the triple digits - and her cocks kept up the pace, dozens upon dozens of massive, dark purple shafts spilling out from her sheath in a seemingly endless flow. Their hundreds of feet were a far cry from Rarity’s monumental slab of fuckflesh, but Twilight was gaining on her. The whole area was alive with musk and pheromones, Twilight and Rarity’s combined scents enough to drive any pony into a rutting frenzy.

Even Dash could not hide how her cock throbbed in their presence. But she kept on frowning, eyes narrowing at Twilight. “So this is why you wanted to judge the cumming competition, is it? So you could swoop in and flaunt your freakish junk? Get a chance to drown Ponyville in spunk?”

Twilight giggled bashfully. “Oh, Dashie, quit teasing me. Surely you realize that I don’t need to orgasm for that. These -” She paused for a moment, closing her eyes while her horn lit up. “540 sextillion liters - are just pre, barely. If I *actually* came…” Her cheeks turned a light crimson as her sheath suddenly lurched forwards, tripling in size and quadrupling the number of lengths coming from it. Her balls grew even more violently, balls heaping into the thousands, glistening with condensed musk in the sun.

Dash jerked back in surprise and stepped back against Rarity’s rear, a wall of marshmallow-soft booty that easily cradled her. “What the hell!?”

“I can’t help it! It feels so nice.” Twilight moaned as her endowments crashed through the landscape, driving deep furrows into the soil and effortlessly crashing through forests on the way towards full erection. Hundreds of feet soon became miles - though her shafts *still* looked small next to the girth of Rarity’s looming cock, which disappeared somewhere in the horizon. As Twilight fidgeted, her top exploded and let her boobs grow as they pleased - much like her ass did, with no pants to contain them. In moments, her curves made Twilight look flat and bony as a twig.

Rarity gracefully reentered the conversation with a gentle bump of her hip, which sent Dash tumbling forwards - only to be caught between the folds of Twilight’s scrotum, in between two balls hundreds of feet wide. Rarity’s own nutsack, an order of magnitude larger, swung in from the other side and trapped the blue pegasus between them, seemingly infinite walls of ultra-pungent, sweaty spheres. Rarity’s voice, nonetheless, carried perfectly over the din of literal seas of jizz being produced around Dash. “Twilight was always going to be the judge, but I’m the one that put her up to entering the competition. You think that she wouldn’t have prepared larger receptacles if she knew she and myself would compete?”

“Oof!” Dash groaned, writhing in her fleshy prison. “So fucking what? Clearly you wanted to show off - what better way than to overflow the tanks?”

“There we have it! *Showing off*.” Rarity emphasized. “That’s exactly what we need to discuss, dear Dashie.”

“I would for sure have changed the preparations!” Twilight said diligently. “Maybe something more fitting for ponies like us. A portal to the moon or - no, that’d just become a ball of cum in a single shot. Somewhere-”

“Shut up!” Dash cried, jostling mightily to free herself. “It sucks to see you show off - so what? You don’t have to be an asshole about it!” Just so happened that her cock was throbbing with the frequency of a strobe light, spilling pre like an open valve as it slid back and forth between the bigger ponies’ nuts.

“My point exactly. I’ll be happy to cease my demonstration if you stop being such a braggart. Do we have a -” Rarity raised an eyebrow. “What’s that I feel? Are you - humping my testicles, Dashie? Does it arouse you to see Twilight and me so big - so very much bigger and better than you?”

“Dash, you might wanna…” Twilight started, losing her voice to a moan. “You’re encouraging them.”

“J-just shut it!” Dash persisted. “I’m not - I haven’t…”' Desperation oozed from her voice as her hips moved, masturbating her fat shaft between them and sending messy splatters of cum arching through the narrow passage. It pooled between her knees, mixed with sweat and rose. Rapidly.

All around them, the rumbling noises of growth intensified. The festival became a small speck between Rarity and Twilight’s round, taut balls, as their cocks reached far across the land - tens of miles, hundreds of miles, lubricating their passage with a calamitous excess of gooey jizz spraying out between them. The very air that Dash breathed became foggy with musk, droplets of sweat the size of a swimming pool rolling down the tight junction between the collosal scrotums and threatening to trap her.

Rarity’s refined giggle cut through the din. “Sounds like you like to see us showing off after all. Is that what you were hoping to provoke with your boasting, earlier?” Rarity turned to Twilight, undaunted by most of the continental landmass slipping under the broad shaft between her legs and the rest being submerged in a world-altering cumflood. “Very well. Since our little friend is enjoying the show so much, what do you say we stop holding back?”

“Is that… Is that a good idea?” Twilight bit her lip. “Dashie, if you’re *sure* you don’t mind..?”

Noises came from between the magnificently endowed dickmares, but Dash’s cries were drowned out by the sudden roaring noises of Rarity’s nuts, lost in the muggy atmosphere. She crawled upwards, still jizzing wildly, but every grasp and tug just sent her friend’s balls swelling far bigger, the slice of open air above rising ever further away.

“She’ll love it, dear. All the time, she was just asking for someone to put her into her place. Who knew?” Rarity gave a dazzling smile. “If not, I’m sure she would tell us. Tell us that she’s sorry for boasting, that she’ll be humble in the future. To everyone, not just *bigger* ponies like us.”

Twilight gave a sidelong glance towards Dash, one hand playing with her enormous, still growing breasts. “Oh yeah. That sounds fair. What do you think, Dashie?”

Again, more noises from the glistening crack between them. They resolved into various curses, the blue pony flinging them until she got hoarse.

“Ah, the poor dear can’t properly reply.” Rarity said. “Allow me.” A half-step sideways parted the walls of balls and let Dash fall to the ground with a resounding splash.

Dash was on her arms and knees in an instant. “Screw you!” She shouted, rising up.

“That comes later.” Rarity laughed. “After my cock gets the space it needs to not be so laughably small.” She smiled at Twilight, her fellow hyper-voluptuous dickmare. “Well?”

Twilight smiled brightly. “Let’s do it! Dashie, you’re gonna love living on my balls!”

Dash cast an intense glance between the two, fighting her rising dread. “No, just listen to me for one goddamn moment and stop all that-”

The resulting burst of growth was so explosive that, for a moment, it broke the sound barrier and deafened poor Dash with her namesake. In an instant, she was pinned once more - but this time there was no sliver of blue sky to be seen above her. Because there was no sky above Rarity and Twilight’s balls. They went straight through the atmosphere, bunching up, as cocks thousands of miles long poured out of their sheathes, curving around the planet itself as if a pair of dueling snakes, displacing the seas with mass and cum as they went round and round again.

“Oh. What’s this?” Rarity said. “Twilight, dear, are you rubbing off on me?”

“I was about to ask you the same thing! I don’t recall my cocks growing *this* thick before…”

“It looks good on you, not to worry! And I’m not used to having Two cocks. Three, four - eight?” Rarity burst out laughing, giving up her count with a shrug as her planetary megacocks multiplied far too fast to keep up with.

“Are. You. *Kidding*. Me?” Dash’s voice resounded from the mother of all walls of balls. Her head stuck out somewhere between the two bigger ponies, though her viewpoint afforded little escape from their oppressive curves and omnipresent cocks.

“What’s the matter, Dashie dear?” Rarity replied with a bat of the eye. “Are we not growing fast enough for you? I can still feel how hard you’re throbbing for our balls.”

“No! No, I’m quite alright! You have to *stop*! You’re filling the goddamn world!”

Twilight giggled. “That happened several minutes ago. You’re thinking far too small.”

“Is that your plan, your end-game? Keep on growing forever, fuck space itself?”

Rarity arched an eyebrow. “If that’s what it takes. Have you been humbled yet by seeing what a *big* pair of ladies look like?”

Dash stared hard at Rarity. “You - you’re really just gonna do it, aren’t you. Goddamn crazy…” She fell silent, among the deafening cacophony of her friends’ many hundreds of thousands of cocks and balls crowding up the solar system. Her gaze switched from Rarity’s composed, challenging stare to Twilight’s blushing, barely contained glee. She sighed. “Fine. Fine! You win. You won! You flooded the whole place with cum, big whoop!”

“Why thank you, dear. That’s so kind of you to say, to accept your third place with such humility.”

“Yes, yes.” Dash said hurriedly. “Now. Can we please go back to how things were? Reverse this mess with magic or whatnot, cover yourselves up?”

“Already?” Twilight asked. “Aww. I was just about to stop decompressing and getting to actually see how big I’ve gotten. And start growing.”

Dash pointed a finger at the purple pony. “No more of that crap! Don’t tease me like that!”

Rarity smiled. “Why? You seem to like it. But no, you’re right. We’ll set things back. Just as soon as we’ve had time to celebrate. Even though Twilight and I have won by default, it seems odd to have a cumming competition without *actually* having a full-strength orgasm at any time, doesn’t it?”

Twilight grinned. “You’re on! Let’s see who takes first place!”

There was an ominous rumble from all around, as if creation itself shivered in fear.

Dash’s face grew pale. “Guys, seriously! It’s not funny-”

And all went white.

Author's Note

PS: Personalities may or may not have been bent to suit my story ends. I'm a hyper-expert, nota show expert!