Author's Note

Popping warning on this chapter.

Fish Swim, Grass Grows, Trixie Takes Her Twilight Loads

Following her brief stint as Twilight's pet maid and personal onahole, the Stuffed and Bulging Trixie had never been more happy to be back in casual clothes. The steamy sex-session had left Trixie more of a spectacle than ever before, so bloated she couldn’t even move... let alone find clothes that would cover her naked blue tummy!

So with no other recourse available, only able to flail her arms and legs helplessly, Trixie had ended up a prisoner to her own big, burgeoning bulge. The parlour-house magician had laid out in Sugarcube Corner for long, long weeks, waiting for her bulbous, blown-up belly to slowly go down... waiting for her stomach to digest hundreds of times her own body weight in gooey “male” ejaculate!

Losing a Magic Duel to Twilight Sparkle was one thing, but becoming a repository for the princess's semen was totally different! When Trixie thought about all that cum her body absorbed, broken down into chemicals that entered her bloodstream and flowed through her body... until Twilight-jizz infused every last inch of her, ooooh! It made her want to curse Twilight’s name a thousand times! Trixie could practically feel that sticky gunk making her mane longer and more lustrous, her features even more charmingly beautiful, and her big fat rack even more stupidly-oversized than before!

Her breasts had creaked and expanded their way from a fairly sizeable G-cup to the deepest depths of the alphabet... Now those wobbling flesh-pillows seemed to herald all her entrances and exits, bouncing into rooms seconds before the rest of her. Her hips, once in some vague equivalence with her shoulders, now cartoonishly ballooned out to hyper-fertile proportions. The pony's sky-blue ass sent the most primitive kind of signalling to the stallion brain possible, so oversized that it would be impossible not to mount her! Trixie had only ever seen a few ponies about town with proportions this preposterous... all Twilight’s friends.

But the worst part was the compliance. An Eagerness to obey - and submit - now permeated Trixie’s body, mind and soul, making her very open indeed to being resaddled by a certain fat purple dick. Where previously the magical pony had been able to mostly restrain her drooling at the sight of that gorgeous pecker, now it might be a race to see which hit the ground first: Twilight’s panties or Trixie’s knees!

Big, busty brains had leaked out, and been replaced with thoughts of hard, purple cock. It was absolutely the worst possible thing that could ever have happened... Trixie was in a fixie!

Curse that confounded pony! And double-curse her monolithic, bitch-making mega-cock!

At least Trixie could take some comfort in actually being able to walk again. And in being out of that shameful maid outfit. And better yet, her time as Twilight’s slave was over. Trixie felt her debt to society was more than paid. After today she never wanted to see that frightful pony ever again.

Yes, Trixie had made up her mind: there would be no encore for the Trixie and Twilight Show! Twilight was far too seductive, far too good at making obeying feel far too good, for Trixie to want to linger around Ponyville much longer.

She’d simply pack her things and be on her way. She would put this whole miserable mess behind her.

But a problem presented itself... Trixie had left some of her magical reagents at the wretched Sparkle's treehouse. A few irreplaceable knick-knacks the sorceress couldn't part with, namely some smoke bombs, half a bottle of brandy, her favourite wand... all tricks of the utmost import to her trade!

The idea of going back to the lair of those twin improbably-large semen factories - tireless cum-orbs that wouldn't rest until the whole world had been drenched in stinking Alicorn-seed - repulsed Trixie. But she didn't seem to have a choice in the matter!

Now then! It went without saying that the real question here was what should Trixie wear to Twilight's house. She skipped to her wagon and immediately dove face-first into a big chest of clothes, deciding what to wear for their meeting.

How exciting!

Something modest, surely~? Something that would present her as a serious-minded pony with no interest in Twilight's pranks and gallivanting. Yes, that would do the trick! One by one, she plucked outfits out of the chest and held them before her newly-endowed figure, admiring the various looks in the mirror.

And in doing so, a problem soon emerged. None of her old clothes fit! As much as it disgusted Trixie to think about it, Twilight's seed had really done a number on her. Trixie's body obstinately proclaimed itself as Twilight's property now, and there was naught to be done about it.

Well, Trixie knew she must let it go and move on. A bright future awaited the young pony on the outskirts of Ponyville, far from the cloying scent of Twilight’s goop-cannon.

Trixie dressed almost unconsciously, thinking of modest outfits while pulling up a bright-purple thong that showed plenty of waist-band above her hips. She followed it up by fitting her colossal behind into jean shorts so overstrained they ripped around her assets, soft and cuddly blue flesh squeezing through the tears. She followed it up with a halter top that looked like a titty-band, some jewelry, and blue platform high-heels with straps... Now she really felt ready to take on that diabolical dick-wielder!

She set out, off to Twilight’s.

Rap-rap-rap-rap-rap! The front door of Twilight’s treehouse rattled and shook under a fist-pounding that would have given even an Apple family girl pause. Then she waited impatiently, toying with her big pearl necklace as she huffed.

Thankfully, the door swung open almost immediately. "Trixie! What a surprise!"

The terrible Twilight stepped out into the sunshine, a little bundle of trouble that was eager to play. Not that one would ever know just how wickedness beat in that heart of hers. Like many of Equestria's Naughtiest, that bad little girly looked as fresh as a daisy. She projected the picture of innocence.

Actually, “innocent-looking” described Twilight perfectly. With the biggest, most soulful lavender eyes, a perky snootle, and just so tight all over, Twilight was the picture perfect of a cute little pony. It reminded Trixie she'd once looked much the same... before Twilight cursed her with the curves of three to four dairy cows!

Twilight was tight and compact, with slender shoulders, supermodel legs that went on forever, and the cutest little tits. They were just modest enough to be illicit, “daddy’s girl” curves guaranteed to drive grown stallions wild. Twilight wore a little blouse at the moment, and those pretty titties did a lovely job of straining it out. The blouse also left her flat, taut belly bare, another charm point for the purple prankster to hold over pot-bellied Trix!

And then there was the matter of her miniskirt.

Whew.

Miniskirts did not suit Twilight, Trixie decided. Whenever she cocked her hips just so, a very familiar sight swayed within its folds. Gulp. Trixie instantly forced her eyes back up to Twilight’s, before something lurched up from under those pleated folds to make her regret it.

In short, Twilight was one heck of a perky young pony... that is, if perky young ponies came in Alicorn flavour.

Her Highness neatly folded her arms across her chest. She fixed Trixie with a smile.

"What brings you back to Ponyville? Couldn't get enough of me?" She gave her hips another coy sway, waggling that member dangling all the way below the knees. It looked like it could throb to life at any moment.

Like a leash tugging on an insolent pet, that long, lissome member forcibly dragged Trixie's gaze downward. Her brows shot up, eyes widening just to take it all in... a fearful look to suit a fearsome cock! Trixie was no less shocked by the sight of Twilight's cock for having seen it before.

There it was: that cock hung out in the open like a sleeping giant... one Trixie hoped to not wake up! She paused to wipe the drool from her thick, thick, thick bimbo-lips, wrist half-sinking into that plush made-for-fellatio excess... and forced herself to meet Twilight's eyes again. "Ahem. That's dreadfully funny, Twilight~”

Trixie tapped her chin, smiling. “Except, oh, wait... No, it isn’t funny at all. I don’t recommend you get into professional comedy any time soon with quips like that."

Trixie boisterously and boldly stepped forwards, forcing Twilight to surrender the space to the wobbling melons filling the gap between them. She immediately took up Twilight’s previous space on the door’s creaking wooden frame, except when she leaned on it, it just caused endless waves of blue tits piling up on her forearm and elbow. They really were bigger than ever, as if grown to match Twilight's shaft for size. "Now, be a little darling and hop out of the way, mm? I just needed to collect a few things I left here, before you accidentally crush them under that repulsive woman-eater..."

Trixie held up her fingers and counted down on them as she spoke. "There should be two big sacks and my best wand hanging about somewhere, and I need to get them stowed away somewhere safe~"

Trixie thought about stepping forward again when a long rod of smooth cockflesh immediately swung up between them, blocking her entry. Twilight lifted her shaft with one hand, playfully petting it with the other.

It looked like both girls had done their fair share of growing. Although with Twilight it was all in one area. Standing in front of Trixie, her cock towered above her own head... and almost met Trixie's face!

The bitch-pony now had a pecker multiple feet in length, rather than just a “scrawny” one, or one-and-a-half. That veiny, ridged horsecock rose to the heavens, looking more like a staff of pony-bloating power than ever before.

And it came with matching fertility, too. Under the lovely, potent shaft, Twilight’s balls churned with just as much apocalyptic weight and size, full as full could be. They nearly knocked against the floor, and swelled closer and closer to it as Twilight’s arousal grew. Twilight Sparkle had become a one-pony lake-maker. Pity the pony she unloaded that monolithic giga-cock inside of.

She giggled. Trixie blanched. As that sweltering, imposing member bridged the gap between one small, girlish pony and the massive, heavy-breasted other, the busty behemoth almost toppled.

Twilight leaned closer, extra-animated. Extra-bouncy, especially around that juicy lamp-post sprouting from between her legs. "Heheh! Well, you don't have to beat around the bush, Trixie. Anypony could see what you really came here for~”

It was a regular David and Goliath struggle. Trixie couldn't help but simper and snivel under that veined monster's attractive ruggedness, the overpowering aroma of hormones designed to made slutty gals like her spread their legs... to say nothing of its taste and touch...

The magician wiped a second trail of drool from her mouth, and gave that powerful dick the back of her hand, smacking it across the head! "Don't be stupid, Twilight, of course I'm here for something other than to stroke your..."

Sticky. Wet. Trixie faltered. In touching Twilight's voracious member, she fingered it a little too loosely. Now her digits wiggled in gooey slime, seemingly stuck. Trixie looked down, afraid of what vision awaited her.

Two of her fingers had wedged inside that evil cock's urethral slit, accidentally teasing Twilight's heavy dick. "Nnn... The smell..."

"Whoa! So I guess you were here just to nnf~ experiment!" Twilight took her former slave's wrist and pulled it away from her cock. "But I've got an experiment of my own prepared, you know? And it’s sooo much better!"

Twilight pushed herself right up against Trixie. Her smaller cleavage was swallowed by the other filly’s massive mams almost immediately, but the size difference didn’t phase Twilight too much. Not when she was winning so convincingly downstairs. Between their legs Twi's throbbing dick slapped and smacked against Trixie.

The blue whimpered from the abuse and Twilight smirked. It was time to give this blue goon a reminder of who the "bigger" pony was around here.

"It's been a while since I've gone all-out. I need a pony who can handle more than a couple of loads. But lately you see, I've gotten so much bigger and more productive down there... most of these ponies, well...”

Twilight actually looked nervous for a moment, and Trixie cocked her hips. “Spit it out, Twilight. Most ponies what?”

Twilight gulped and leaned in, speaking in a low whisper. “They explode.”

Twilight clasped her hands together, then drew them slowly apart, making dorky explosion sounds all the while. “Kablammo! Ploosh! Boom!”

“And not justafter a couple of loads, I could believe that much... We’re talking after I’ve just gotten started! One load from me is enough to pop any mare or stallion, it seems like!"

Twilight folded her hands behind her back, rocking on her heels. “Celestia says someponies are starting to raise a fuss about it! But... Mmm... It’s not fair! I’m doing important research for the future of Equestria here, I need to blow off some steam every once in a while! I just can’t help it, you know?”

Twilight seemed to realize she’d been meandering, because her expression immediately lost its faraway look. Her eyes refocused on Trixie straight away, and she smiled a predatory smile. “Mmm.”

What a sight they made together. An oversized Amazon of a mare with ginormo-knockers out to here... and Twilight actually making her back up a little by pressuring those bazooka-breasts with her pea-shooters.

“Which is why I’m soooo glad you’re here, Trixums,” cooed Twilight in a very affectionate tone. She soaked her words in a syrupy-sweetness that promised good times for everyone, but most of all for herself.

Trixie just wanted to whimper the more she heard. Not like this! Anything but this! Her eyes darted this way and that, searching for any way out... Twilight was already planning to reel Trixie back in for a round two, and she was talking about increased capacity as well? Trixie had been broken, shamed, defeated, overwhelmed, but at least she hadn’t been... popped.

Popping! The word alone was enough to make a fearful tingle go down her spine. Was Twilight for real? She was talking about making more than her own body-weight in spunk, pouring out endless tidal waves of gooey, smelly jizz that would bloat mares bigger and bigger and bigger... until they finally gave a to-scale representation of that little “kablammo” Twilight had done with her hands just a moment ago.

Yes, there was no doubt about it. Trixie had to get out of here right now. Forget her baubles, accoutrements and other such knick-knacks. A cockless mare like her couldn’t possibly stand up to the perky firebrand giggling and swaying in front of her... She just couldn’t end up Twilight’s chew-toy again!

Trixie raised a finger, beginning to protest, when she was abruptly cut off by Twilight again. “I know you’re up to it, Trixie! The more powerful a pony’s magic, the more she can stretch and expand before those final, fatal litres... And it is you we’re talking about! After all...”

Twilight pushed herself more firmly against Trixie's rack. "My magic has gotten a whole lot stronger since we last saw each other... Hasn’t yours?"

Trixie froze. She snuffled. Her brows knit and that raised finger of hers wobbled in the air. What had Twilight just said? That hadn’t sounded right at all... Now her bimbofied brain centres struggled to process the longer, more complicated words. It was a wonder nobody had put an “Out Of Order” sign on her brain yet.

Twilight read her rival’s confused expression correctly. “Come on, do I have to “spell” it out for you, Trixie? You were my student while you were here... Surely you learned a thing or two, right?”

She grinned. “Don’t tell me... while my magical strength has doubled... or tripled... you’re still the same old weedy weakling Trixie? Oh my~”

Trixie just about had steam shooting out of her ears by now! A challenge against her lovely Trixieness? Well, that just wouldn’t stand!

The showpony struck one of her trademark poses, one hand splayed out across her chest... the previously-heroic gesture now turned indecent by her impossibly abundant and lovely new assets. "Scoff! Has my magic gotten stronger? What do you think, Twilight Spunkle?"

Almost as soon as the words tumbled out of Trixie’s mouth, she regretted them. She ran her chops faster than her defused brain could keep up, spouting dangerous words that promised to get her into some seriously hot water.

But Trixie didn’t stop there. If anything, she became more incensed. She waggled a finger in Twilight's face, casting a long shadow over the shorter, smaller pony. She draped those tits on the little one's face, inviting her to suckle from the overflowing font. "How... How dare you! You're just a little runt! Nothing like the Grrrreat and Powerful Trixie! I seem to recall having no trouble at all taking your largest loads, and keeping your house spick and span at the same time!”

Trixie turned away, storming in an angry circle. “Ungrateful pony! Ungrateful punk!"

As suddenly as she turned away, Trixie whipped back to Twilight. Twilight could tell Trixie was forming more bile, but she was used to that by now. She just wanted to watch those heavenly, glossy milkers heave and wobble.

“And another thing...” Trixie began, before her voice unexpectedly died in her throat. An unfamiliar tension around her middle effectively silenced her. Slowly, Trixie glanced down.

She gulped. And rightly so, for a supremely concerning sight confronted her. Twilight hooked a finger in Trixie’s flimsy halter top.

In the end, the little royal just had succumbed to temptation. Trixie’s melons had been a-wobblin’ and a-heavin’ all this time, and Twilight finally seized her prize. She tugged on the flimsy overstretched top, effortlessly letting those gigantic breasts bounce free from their constraints.

"That was then," said Twilight, taking a big, fat Trixie-titty in either hand. With her unceasing callousness for lovely female flesh, Twilight twisted those big puffy nips - each the size of a thumb - and brought them together around her superlative-defying, reason-defying shaft.

Once seated between them, Twilight very leisurely squeezed her fat cock deeper betwixt those two huge teats. Trixie’s body was custom-tailored to fit her, after all. "This is now."

Twilight sighed in relief as Trixie’s soft cleavage swallowed up her hardness. Even after trying on so many new ponies, Trixie remained Twilight’s #1 for comfort.

"Now, how about you help me out with a little experiment, mm? I’ll even outfit you with a new wagon... if you perform, that is.”

Trixie took a step back, half to reassert herself, and half to take a breather from Twilight’s hypnotic musk.

"Whatever, ‘little girl.’ From where Trixie is standing, it simply looks like your megalomaniacal ego is playing up again. You’re still woefully unprepared for..." She raised a hand much in the way a magician's assistant would, sweeping it down her bulging, obscenity-inviting frame, "... All this pony!"

"Forget the goods,” Trixie said, hip-checking that excessive dick. “I'm just excited to be able to put Little Miss Special back in her place."

Trixie finally seemed to remember she had several heads of height on Twilight and almost twice her weight, and she elbowed past the little brainiac and into her home. She swayed her hips exaggeratedly as she walked, smirking as she actively teased Twi now. "And when I'm done milking out all the cum from those little ‘acorns’ you call your ‘nuts’, maybe I'll have you lick my boots for a change! Uwahaha!"

Trixie clenched her fists, grinning ear to ear. She looked just like the old Trixie, fully revitalized and ready to duel her rival. "Yes! It's Trixie Time!"

"'Trixie Time?’ I think 'Twilight Time' is more appropriate!” teased a super-smarmy and super-hung Twilight, one finger playfully tapping her chin.

And that playful teasing sealed the deal. Trixie immediately turned on Twilight, looking more ready for a fight than ever. Even a solid cutie like Twilight had to be intimidated by that! “We’ll just see about that!”

And then silence, aside from the faint tweeting of birds, and the gossip of idle ponies out in Ponyville. Trixie looked much too frustrated and much too deep-in to do any other than huff and puff blithely, watching that smug little matriarch with blazing-hot eyes. Her balloon tits, unnaturally-large but all-too-naturally bouncing still basked in the open air, heaving between the girls with every little laboured breath Trixie took.

Twilight finally broke the silence. “Mmmm... Gooood... That’s the Trixie that’s been missing from my life! That’s what gets mama Twilight super-duper stiff!”

She cocked an eyebrow, slyly smiling up at the bigger girl. “Do you even realize how easy I had to go on you when you were my maid? The only reason I didn't blow you up then was because I needed my library cleaned. But this time?"

Twilight’s magic tangled in Trixie’s puffy white mane, tugging her down a few feet so they were eye-to-eye. "Celestia have mercy on you if this is another one of your little bluffs! Because I'm not holding back this time~" Her cock bounced between Trixie's amazing knockers, throbbing directly in her face.

"Twilight-Schmilight," Trixie gloated, hooding her eyes, fluttering her long eyelashes. "You're just the runt of the litter, freakish endowment or not... You're a failure as a mare! Skinny and small, where you should be curvy and voluptuous like me!"

“Let’s get started then, shall we?” grinned Twilight.

Big and Small lumbered and sashayed through Twilight's home. They hemmed and hawwed over the best place to settle their dispute.

The lounge lacked a comfy place to lay down... Maybe the garden? Trixie needed looots of space to grow! But the pair only barely started searching when Trixie couldn’t resist taking another dig: "I assure you, Twilight Sparkle, this will be like taking candy from a baby."

Trixie hefted her bare bosoms, waggling them in Twilight's face. She practically invited the little futanari to get a huge, angry boner! "And an undernourished baby at that. One mommy never let drink from the teat~”

Trixie hefted her capacious blue tits capriciously. “What's the matter? Does widdle baby Twily want a little succ-succ? Ohohoho!"

Those tantalizing nipples made Twilight purr, and her cock bob up to its apocalyptic full length. The extra hardness finally gave her exactly what she needed: something to give that mouthy a firm thwack with, and shut her up. Twilight slapped those swaying knockers with her even more impressively-sized dick.

“Your teasing is getting obnoxious, Trixie. How can you be so overconfident in the presence of your Mistress? A pony who could obliterate you in any number of ways... including a huge messy cumsplosion?”

Twilight pressed her cock’s leaking head against Trixie’s fat bimbo lips. Trixie’s drooling spunk-hole sucked on autopilot, almost immediately giving Twilight an unconscious little lick for her trouble.

"Sure, it'd be a shame to waste these. Resurrection spells are tricky, even for me, and Celestia’s been running me ragged undoing all the damage I’ve been causing... Having to squeeze a fatass like you back from the afterlife might just push me to my limits, heheh~” Twilight spoke as calmly as if she discussed the weather.

“But on the other hand... There’s nothing I’d love more than to pump you so full of seed you really did explode!" That certainly set her off cackling.

Unable to restrain herself any longer, Twilight then pounced on Trixie. She took both the behemoth babe’s breasts in hand, and firmly squeezed them together around her deific shaft. Trixie started to cry out in protest, only to be silenced as Twilight wrapped her mouth around one of those big, thick nipples wobbling in her face. Twilight slurped and nibbled Trixie’s nipples all over, and the magician mewled.

By the time Trixie floated back from her happy place, she found the plump head of Twilight’s oversized dick jammed against her face and invading her mouth.

Trixie started to cry out in protest, only for Twilight to silence her as she wrapped her mouth around one of those big, thick and upright nipples wobbling in her face.

Trixie loved it. She laughed boisterously, really getting into the spirit of their contest now! "Well! If you ask Trixie, the only thing that's going to need a resurrection spell at the end of today is going to be your sex drive, Twilight! Time for you to learn your lesson about messing with the best~" she cackled, using her full weight to wrestle with the little waif of a pony.

With both eyes locked on Twilight's dominant glare, Trixie stuck her big red tongue, bumping and slithering it along the underside of Twilight's gargantuan rod... With a gulp and a slurp, Trixie tugged Twilight back into her mouth, immersing her rival in her warm, pussy-like throat.

Trixie wasn't kidding about her skills at least: she had become a cocksucking diva since last time! Her newly-grown bimbo lips succulently smothered the iron-hard head of Twilight's member, and the little Alicorn groaned in pleasure. Trixie's lips deformed around the vulgar pole, smooshing and squishing and divulging tons of saliva as they comfort-fit the Alicorn's shaft. The big pony suck-slurped her way down the mega-cock inch by inch, smirking all the way~ "Mmmn..."

Twilight worked to a similar degree on one of Trixie's colossal nipples, sucking super-hard. Each springy nub was as big as a teacup, and sucking on them felt like Heaven for both ponies. Equestria boasted few bodies as overdeveloped as Trixie's: made-for-sex plush-pile sets of curves that hung studs (like Twilight) could fuck for hours and hours without getting tired.

"Hmmph!" Twilight popped the nipple from her mouth. Her head spun, her hormones going haywire. She had to cum! Like a thousand gallons! A million!

"Down on your knees, Trixie! Down where you belong!" A strong magical weight pushed down on Trixie. Soon she dropped low enough Twilight could grip her bitch's shoulders and guide her the rest of the way.

Trixie whined in pain as her knees hit the floorboards, but the sound came out muffled around the lewdly-throbbing shaft forcing its way deeper down her throat. "Hkkkk... Schhhhhhlck..."

And despite that, the sucker’s skilled attentions upon the suckee didn’t spot for a heartbeat. She enticed a burst of precum from Twilight's rapidly swelling balls, along with an extra-lusty lady-growl. "Nngh!"

It flowed into her. A great quantity. A belly-distending quantity. Just from the first, smallest gush.

Eep.

For the first time since entering Twilight's home, that cocky grin on Trixie's face fell a little bit! Her expression darkened slightly, more with indignance than fear or pain. "Hkk! Twilight, be careful! Trixie requires finer care than those little cumbuckets you do all your "Friendship" bullshit with~"

It was a ruse, of course. Trixie knew all too well that, for Twilight, Friendship paled in comparison to massive tits and hot pussies. Trixie had spent long years using her body to seduce more “loyal” husbands than she cared to count, and she consistently found a little goading was nice every now and then when it came to getting her conquests... and Trixie sorely wanted Twilight as another notch on her belt, another conquest for the Great and Powerful Trixie.

Trixie wanted to stay angry, but something about that little purple crotch in her face, those little purple hands needily digging into her thick, broad shoulders... and most of all, that warm member straining its way down to the depths of her allegedly "bottomless" tummy made it hard to remember quite what she'd been so mad about... so she just sucked harder. Soon, she raised both hands to squish and knead at Twilight's enormous sack, seizing fistfuls of nut-flesh, listening to their contents slosh. She locked eyes with her Mistress, obediently working her throat to pleasure the tiny filly's pony-pole.

The more eagerly Trixie began to blow Twilight, the more the petite princess sneered down at the cock-addled floozy. "Hmhm~ I have to say, Trixie, you're much more pleasant to be around when that loud mouth is stuffed full of dick!"

Twilight thrust her hips forward, ramming several more inches of cock straight down Trixie's throat, again and again, deeper and deeper. "Nnngh! But you're absolutely adorable as Princess Sparkle’s personal cock-slurper!"

Trixie’s lead - slurping up a storm on the end of Twilight’s fat cock - was wrapping up. Her partner took over. It became a battle for a moment: Twilight and Trixie both thrusting, meeting in the middle for sloppy cum-geysers that saw white goo storming down the front of Trixie’s lovely frame...

But Twilight was a very energetic little pony with powerful hips. Again and again, she thrust, and she thrust hard. Soon, Trixie was backed onto her haunches with nowhere to go. With her hooves buried in her buttcheeks and Twilight’s hands around her pretty little head, the bimbo had no choice but to get pounded.

Trixie's mouth stretched out into a trembling "O" that ripped around Twilight's firing cock, strained past its limits into a ridiculous-looking onahole. Her nostrils flared, huffing in deep gulps of air as that suffocating cock drove inside of her... Twilight facefucked Trixie like a cheap sex-toy, make-up spilling down her face as she hit those chops again and again and again.

Twilight's vicious thrusts unleashed a flood of cum into Trixie. Gallons upon gallons gushed straight down her throat. Twilight's now-floor-bound balls relentlessly let loose their contents into this slut. Trixie's swelling belly sloshed immediately to the floor, weighing her in place.

But their fun was only beginning. Wave after wave after wave of cum flooded into Trixie. And despite that, Twi never stopped ramming those amazing bimbo lips. Who could have? This was the most exciting part!

Soon enough, Trixie became more cum than pony. But Twilight continued still for several minutes, groaning... when not mocking what a whore Trixie was.

The sight Twilight had been craving arrived. Trixie's arrogant, cocky smirk falling from her face, and slowly turning to a look of wide-eyed, disbelieving fear... Well! Thathad been absent from Twilight’s life for much too long, seeing it once again was like being visited again by an old friend.

And those eyes! The best part! Bugged-out and wincing, all their fire gone out, replaced with helpless tears that rolled down Trixie's cheeks. as she inflated, sweat beading on her forehead... Twilight had seen plenty of growing, expanding, sloshing bellies in her time, but nobody performed "utter, humiliating defeat" quite like her favourite pony Trixie.

That delectable vision of beauty burned into Twilight's mind. She could count on the face of the snivelling and defeated Trixie to warm her heart for years to come.

Twilight’s power over Trixie's fate was total. She held the decision over whether the slutty unicorn bitch lived or died.

And Trixie knew it. She felt Twilight's total control and ownership in every inch of her big bimbo body. Twilight moaned, enjoying the look of terror on Trixie's face as much as the pleasure of those lips.

Trixie struggled to free herself from that turgid member, but Twilight's magic was as strong as ever. The little devil wielded power enough to end or create worlds. She had more strength in her little pinky than Trixie’s entire body... "Glk... Gkkkkk!"

Twilight held leverage onto her favorite victim as she flooded her with more and more seed. Trixie’s cum belly sprawled out underneath them around Twilight’s second or third spurt, now raising them up a few feet every time Twilight released another big gush.

She stopped and mopped her brow. "Wow, Trixie, this might be the biggest I've ever seen you! Amazing, that was just one load!"

Twilight slowly tugged her massive rod from Trixie's perfect mouth, almost sad that this might be the last time those wrapped around her cock. But she wanted a good view of Trixie from both sides this one last time. Twilight had to admit, Trixie certainly looked less confident and capable now, what with her own bulged-out gut trapping her, sexy long legs kicking in the air. Those giant breasts of her’s, impossibly well-formed and springy for their size, now looked like rounded nipples atop the huge swell of her sloshing, cum-packed belly.

Twilight slapped a hand down on Trixie’s plump behind, drawing a shocked “Eek!” from the immobile pony. Still trapped on top of her own tummy, the Bulging and Distended Trixie whined plaintively as she heard the long, drawn-out riiiiiip of Twilight’s magic splitting a hole in her shorts. It put cool air on her big plump ponut, while keeping the rest of her midsection fully-covered.

The gushing slit of her pussy went completely overlooked by Twilight. That bitch loved to ram ass far too much: a sadist like Princess Twilight “Needs No Coercion For Anal Insertion” Sparkle thirsted to see cute girls whining as their thick butts and raw assholes were painfully exploited.

After all, the devilish little anal plunderer could overflow Trixie’s womb in one or two thrusts, while her stomach seemed like it could still take a few more million gallons!.

"Ready for round two, Trixie?"

Trixie began the usual act of begging for her life. “W-Wait! You win, you win! I submit, Twilight Sparkle!”

It all sounded silly to Twilight. She heard it all the time from cum-drunk floozies right before they popped, and disregarded it just as often. "Trixie has seen the error of her ways, so... Hnnnn!"

Twilight’s responded by lining herself up with Trixie’s cute booty.

"Let me rest!” continued Trixie. “I can't get that big again... All your seed took forever to digest, so... So... Just don't leave me packed full of cum again!"

Twilight laughed. "Oh, you won't get that big again. You're going to get bigger. Much, much bigger!"

The head of Twilight’s monstrous shaft pounded on Trixie's tight butthole, the constant pressure slowly stretching Trixie open. She underwent a dozen silly, helpless faces and cries of discomfort before the head finally popped in.

Twilight's hard cock spread Trixie’s butthole tight around her like a condom. The magician lost her voice momentarily. She sheathed Mistress's shaft, a cum tank for the purplest pecker in Ponyville to disgorge sloppy, smelly pints of jizz into.

Without missing a beat, Twilight began to cram inches upon inches into Trixie with every thrust, getting more aggressive each time. Twilight smacked Trixie’s fat ass over and over, watching it wobble as she pounded into it.

And her curvy playmate moaned in simple, mindless pleasure.

Trixie was having trouble speaking now... and not because she was choked up with emotion. Even when her life was on the line, even when that springy energetic cock was just a few thrusts from spraying swimming pools of cum into her, Trixie was still cumming her brains out.

Even knowing that dick in her right now was soon going to turn her bulging midsection into white splatter across the room and walls of Twilight's treehouse, Trixie still couldn’t help but feel a deep and pure love for Twilight’s awesome cock. That piggy little slave’s eyes were rolling, her suctioning butt tightening up on the sticky member. "Noooo~"

And Twilight just purred in delight. That little royal was giggling to herself from where she was half-buried in Trixie’s huge ass, her (radiantly smiling) face, hips and bust all sunk into the growing expanse of cuddly blue flesh.

Twilight was howling with laughter most maniacal, more than befitting a wicked, spoilt little princess like her. Her squeals of delight grew more frantic and depraved as that death-dealing erection got closer and closer to the final gusher. “Yessss! This feels incredible! Trixie! I’m so glad you’re back! Trixieeeee!”

Twilight could have screwed her Muse all day, but her living room was starting to get more than just a tiny bit cramped! With the sheer volumes of cum Twilight had been pouring into her all this time, Trixie had been without any recourse but to continue growing... and goodness was it starting to show. She had filled over half the huge multi-storey room now, bumping up against bookcases, toppling chairs and tables.

And now, even her magically-enhanced clothes were busting off of her. With a great tear of ripping denim, Trixie’s ass finally outgrew her shorts: the flimsy, small garment exploded off her butt, leaving those growing buttcheeks to relax into their natural rounded shapes. Her thong persisted a little longer, but now it looked more like a rubber band wrapped around her ass. It did absolutely nothing to cover her bulging puckered ponut and her plump-lipped, slavering horse-pussy.

Trixie's midsection was barely recognizable as a tummy anymore... The pony had grown far beyond any previous size she'd ever have thought possible, months of sex with Twilight having reinforced her capacity and stretchiness.

But she still felt every gurgle and slosh and creak. Each impossible extra inch of gravidity was experienced in implicit detail. Trixie howled all the way through it: for her, the disgustingly submissive pleasure of being made into a living semen tank was engraved upon her soul. She would never forget how fulfilled it had made her feel. How good.

But all good things had to come to an end, didn’t they? Trixie knew it was time for this to end... even that boorish Twilight would surely realize that!

So, from the top of that creaking, sloshing sphere, Twilight finally heard a timid voice: "Twilight... While Trixie might have wanted to go out with a bang, she never imagined it like this! I can't take another drop... so... please! Please no more cum!"

Twilight would have acknowledged Trixie's pleas for mercy... but did she even have the heart to tell the other pony she'd only just gotten her warm-up orgasms out of the way? Twilight's expanded nuts trailed out along behind her like two huge beanbags now... and no matter how much seed she seemed to pour into the whimpering, burbling slut under her, they didn't seem to diminish by a single drop.

So instead, she spat on that suggestion, spiting Trixie by roughly pounding every last inch of her shaft into belly, those immense slabs of assflesh bouncing in time with her thrusts. Twilight gave herself a magical boost in ramming, becoming almost a purple blur, nuts swollen much further than before in anticipation for a much larger load.

"Come on, Trixie, you're a unicorn! Hold yourself - nnnph - together!" With a long moan, Twilight unleashed an even more powerful load than before. She was dragged upwards, an audible sloshing echoing in the ever-more-cramped library as the couple swayed atop Trixie's cumtanker of a belly.

And that was the really nice part for Twilight. In addition to the sizzling pleasure of orgasm, actually draining her nuts a little with each blast of cum inside her pet felt almost too good for words. She was relieving her pressure an inch at a time.

It was a pleasure only the hyper-endowed would ever know, a glorious sensation that occasionally necessitated the internal destruction of cockless blue bitches like Trixie... but was totally, absolutely worth it!

"I'mmmmm..... Tryinggggg!"

Trixie looked back at Twilight, crying out, trying to use the magic of her stifled horn to release some of the pressure on her pained belly, or even just keep her integrity intact and herself alive a few seconds longer. But time was ticking down to detonation, and Trixie's final show was about to be one heck of a bomb.

“I’m cumminggggg!” howled Twilight.

And that was it for Trixie. Up until now, there had been three separate oceans of cum. The original one inside Trixie's gut - a sloshing white vista that bulged her belly to bursting point - and the two sealed away inside the purple pony's ballsack. They had been causing her almost as much discomfort from their growing size as Trixie's tum!

But now they were emptying. Those huge orbs visibly diminished in size as they unloaded into Trixie’s belly. Three became one.

"Eep,” squeaked Trixie.

“Ulp,” agreed Twilight.

With a deafening explosion, Trixie burst under Twilight.

The show pony’s last conscious thought was one of relief. Relief that the pressure in her middle had finally subsided, and all that cum sloshing inside of her had somewhere to go that wasn’t making her squirm in discomfort.

Trixie watched in fascination as all those endless litres of semen that had been roiling and raging inside of her, fighting to make room not just for itself but the thousands more cumming, had finally reached a breaking point. A leak had sprung in Trixie's belly, and it was growing.

Waves of Twilight’s semen struck the tree house like a typhoon. They slapped against the walls like the fists of an angry god, striking so hard that entire rows of books came tumbling down. They were quickly deposited in the thick, bubbling cum-stew, where they vanished to the bottom with just a few little bubbles. Pungent-smelling tidal waves roiled and circled around the floor, crashing against the walls, breaking in sparkling spray.

There was so much of it it was hard to believe it had all been made by one cute little pony. But the proof was in the pudding... Pudding that certainly wasn’t in Trixie any more.

Twilight now stood waist-deep in a pool of cum flooding the entire library and basement. Trixie's shameless slut clothes drifted to the floor, her thong ending up hanging off the end of Twilight's engorged super-cock.

"Oopsie~" giggled the pint-sized predator.

The white cascades of semen dripping down the racks of books and the bole of the tree had little response for the whimsical Alicorn babe laughing at her friend's misfortune~

Of course, someone was going to have to clean this up.

So when Trixie’s spirit, a white and wavy outline of her friend with a vapoury tail in place of hooves, floated down from the ceiling, Twilight actually looked relieved.

At least up until Trixie gave her a bonk on the head.

“Ow! What was that for?”

“You... You blew me up!”

"Well, you were the one boasting! And that was hardly your best showing, Trixie.”

“You... You... Twilight, I can literally see parts of me coating the walls!”

“Yes! And now I have to revive you and everything! You are soooo indebted to me for this!”

“What! How dare you?” scoffed Trixie.

“One year maid service! At least!”

“Idiot! Buffoon! ”

Twilight shrugged. “I could just leave you like that...”

The spirit’s wiggling tail grew more animated. Stay dead? When so much of Equestria was still yet to experience Trixie’s greatness? Not on her life! “You’d better make me a new body! A nice one! My... My old body! Not that big-titty barbie doll you made me into!”

“Yes, yes... Geez, so demanding!”