"O-oh!" Fluttershy panted. "Oh yes! There! Harder! Harder!"
Much as he would have liked to, Anon couldn't imagine getting any harder than he was right then. Every moan, every groan, every schlick of her tight little pussy as she bounced on him... how could it get any better than it already was? He did aim to please, though, and thrusted into Fluttershy for all he was worth.
"Goodness!" she groaned. A dollop of creamy precum pushed up from her cock and trailed lazily down Anon's chest. And he loved that too — everything about her, including and especially a cock that was big enough to shame a full-grown man, much less a precious little pony. "Keep... Keep going!"
So lost were they in the moment that Anon hardly even noticed what was happening. The steady rise of her flare on his chest, leaving bigger and stickier drops with every passing moment. The jiggle in her doughy flank as it rose slowly like loaf of bread in the oven. A corner of his brain whispered that something was off, but if his conscious mind noticed at all, it was only to realize that things were getting better. Every bounce up and down came a little bit heavier and harder than the last, and if that kept up, then he'd be coming harder than ever.
But inch stacked on inch and pound stacked on pound, and eventually they added up. The last bounce, nearly hard enough to bruise his hips, stirred Anon briefly from his lust-drunk stupor. He gave Fluttershy's overflowing booty a squeeze, and it occurred to him that the little pony who'd fit before in his lap had grown wider around than he was. "Fluttershy!" he gasped. "You're..."
"Oh!" Fluttershy's rhythm slowed, but only barely. "I didn't realize I'd grow this quickly!" She gave a low groan as she hilted on him again, burying Anon's thighs beneath her luscious new cheeks. "I-I'm sorry. Do you want to stop? W-we can stop now if you... uuungh..." Her throbbing pussy, still tight but no longer so little, wrapped his cock in a vicelike squeeze. "We can stop now if you want..."
"No, of course, not!" He stifled a moan as Fluttershy rose up off his dick, her pussy releasing him with a mournful slurp. "It's... It's really hot, actually."
"Are you sure?" Fluttershy asked, crawling up over him. Her fattening cock slid gently up beneath his chin, and Anon's eyes widened as he realized just how big she'd actually gotten. She stood at chest-height on all fours, at least — or bigger, even! Her shadow loomed over him like, like — holy cow — like Princess Celestia herself. Any bigger, and she'd officially be taller than the goddess of the sun...
"Y-yeah." His cheeks flushed, partly from the heat of the moment and partly from the heat of Fluttershy's surging cock. "It's pretty hot."
"O-okay, then! I just wanted to be sure..." She blushed. "I mean, I've just gotten so big now that I think maybe we should try something else. And I think my, um..." A meaningful glance toward her drooling package — a twitching black obelisk the size of his arm — which had started coating his neck in a goopy layer of pre. "You know. Could you, um, give it a little... a little attention, please?"
"Of course!" he blurted out, the words leaving his lips before he'd fully processed their meaning. By the time he'd worked out the logistics of a blowjob at Fluttershy's size, her sticky cockhead had already started smearing itself over his cheek. "Mmmf!"
"Mmmf!" Fluttershy agreed, as he opened his mouth wide and wrapped his lips tightly over the flared head. "Oooooooh!"
While Anon had never actually sucked a pony off before, he'd managed to intuit some of the basics to keep Fluttershy happy. Suck, lick, slurp, repeat, all to give as much care as possible to the pegasus meat in his mouth. The rhythm seemed to work for Fluttershy, who was humming some sort of song as she thrusted. The thrusts in clogged his throat solidly with space-consuming cock, while the thrusts out granted him precious reprieves for air — though air saturated with her cloying musk.
Eventually, though, her penis grew too big for him to take without breaking his jaw, so he settled instead for sucking on her oozing tip like a straw. It took constant swallowing him from drowning in the stream of salty precum flowing down his throat, and for the moment he could drink enough to manage her ridiculous production, but he could already feel her testicles sloshing bigger and fuller on his stomach. No matter how much he gulped down, Fluttershy's bloating nuts had more to spare, and her growing cock was all too happy to deliver.
"Ah!" She gasped as a positive blob of cum escaped from her tip, finally more than Anon could swallow. Her honeypot down below soaked his legs in its own fragrant juices, covering him from head-to-toe in various drippings. "Sorry!"
"It's fine!" He gasped back — more for oxygen than anything. He wiped the excess cum from his eyes, which widened quickly as he looked Fluttershy over. Somehow, she was no longer standing on the bed, but over it, her head pressing dangerously close toward the ceiling. Her cock alone now was as heavy as she'd been before all this, and getting heavier as it stretched over him. "F-Fluttershy!"
"Oh, I know!" She said gleefully. "I'm sorry I didn't say anything about this earlier, but it just feels so... soooo goood." She moaned as she blew up another foot, pinning Anon beneath her hefty horse cock as she ground herself on the bed. The ceiling cracked audibly. "Mmmmm..."
"Alright," he muttered, shifting his head from the gushing firehose that Fluttershy's slit had become. "How about a full bodyjob?"
There was only so much he could do to please her with her pulsing shaft pressing him into the mattress, medial ring rubbing him up and down, but he tried his best to wrestle with it. He grabbed onto it like a bucking bull — just barely able to lock his arms around it — and gave it a couple awkward kicks, which Fluttershy seemed to love.
"So good..." Fluttershy whispered, plenty loud enough to hear at her size. "So, so good!" Plaster and splinters rained down from the ceiling as Fluttershy grew her way through it, a single room no longer big enough to hold her burgeoning bulk. A massive hoof moved down to fondle her swelling balls and tease her bowling-ball clit. "So, so, so good!"
"Oh shit!" The bed cracked under their combined weight — mostly Fluttershy's — giving Anon just enough space to wiggle out from under her erection. He clambered quickly over tons of twitching Fluttershy, making it through the door just as a mound of booty fat filled out over it. No time to get dressed before leaving the house. Fluttershy's growth had apparently kicked into overdrive, and if the enormous pink butterfly imprints pressing through wall-cracks were any clue, the house itself wasn't long for this world. "And I'd just paid it off!" he groaned.
Fluttershy groaned louder.
It felt awkward as hell to leave the house with no clothes on, but it wasn't like Equestria had much of a dress code. The ponies out on the streets were more concerned about the ominous creaking from the house — and a minute later, the rising head of Fluttershy bursting through the roof, followed shortly by her other head. Soon enough the entire house burst around her, leaving a massive, ragingly erect Fluttershy sitting out in the streets. The mere sight of that towering shaft, towering ever higher as her enormous hooves stroked it, was enough to give every stallion around a diamond-hard boner of their own.
"Anooooon!" she sang in her graceful, booming voice. "Where's my little bundle of love?"
"R-right here!" he shouted, stepping gingerly through the remains of his house. He tried not to think too hard about the dozens of ponies watching the display. His attention fixed itself instead on Fluttershy's gigantic puffy pussy, bigger than his old front door and drooling for attention. "Want me to help?"
"P-please?" she whimpered. Somehow, even at her size, her every little (little!) grunt and groan still sounded adorable as ever. "I'd be so, so grateful if you could..."
Well, who was he to deny her? He stepped up to her pussy, taking a moment to admire just how big her drooling cave had grown. He could see its every twitch and spurt in exacting detail, undulating wetly as it waited for his touch. He gave her folds a gentle stroke and smiled as Fluttershy moaned above him. "Definitely a little big for the dick."
And speaking of the dick, he couldn't help but notice it was awful dark under Fluttershy's crotch. Her weighty sack seemed to blot out light as her balls swelled ever larger, churning like industrial cement mixers and sitting at roughly the same size. A steady rain of heavy cream rolled in from the heavens, soaking him in fresh layers of her juices as he teased her needy cunt. There wasn't much he could do but massage the folds, but he did so with gusto. Briefly he experimented with shoving a whole arm inside — then quickly pulled it out as he realized her lips could squeeze and suck hard enough to dislocate his shoulder. Fluttershy responded with another shudder of growth, and a whimper for more.
It was tough work, but someone had to do it. He retained a dim awareness of Fluttershy thrashing above him as he wrestled with her labia, dirt piling in a ring as her expanding flank shoved it aside. Far from threatening only one home, her jiggling booty was quickly encroaching onto other ponies' houses, and it overpowered them just as easily as it had Anon's. Thick drops of cum splattered to the ground around her, forming ankle-deep puddles of warm white seed. Somewhere in his head, Anon had to wonder if this big was too big. The rest of his thoughts were focused solely on pleasing Fluttershy. A caress of her folds, a rub of her cherry-red clit... Whatever it took to make her happy.
"Ah, ah, aaaaah!" She screamed as her first orgasm broke, dick twitching as it coated the Town Hall in ropy strings of pegasus cum. A wave of vaginal juices crashed over Anon as she soared to new heights, and by the end of it her throbbing clit stood just out of his reach, its rhythmic thrum almost taunting him with the prospect of a pleasure button the size of his own head. "Oh, goodness!" she giggled. "That was a big one!"
"You don't say..." Anon spat out a mouthful of her juices, unsure if he'd ever be able to shower her musk off — or if he'd ever want to. He retreated to a safe distance, hoping he could grab Fluttershy's attention. Now that she'd gotten her happy ending, it was probably time to put an end to all of this. Biggest pony was best pony, but there were limits to how big she could get without wrecking the whole town. "Hey! Fluttershy! Down here!"
"Mmm?" Fluttershy took a moment from her dreamy haze to look down, ears perking as her eyes fell on Anon. "Thank you so much, Anon!" She leaned down to give him a warm, wet kiss, and he shuddered as her titanic lips brushed briefly over his cock. "You've been so sweet about this. Don't worry, I know it'd be rude to ask you for more at your size. You just wait here and I'll handle the rest of it aaaaall by myself."
"W-wait!" He shouted, but it was too late for her to hear him. She was already stomping over to her next victim, and with every step, a distinctive trail of warm fluids leaked from her overstimulated genitals. "I'm still horny!"
"I'm so very sorry about this, my little ponies," she said, looming over a fairly large house on the corner, "but I need this really, really badly right now. And it'd just be so rude to Anon for all of this to go to waste." She gave the occupying stallion a second to clear the premises before her dick battered down the front door. "Oh, yes! I really did need this!" Wood cracked and creaked all around the house as her shaft expanded, widening its own entrance at the home's expense. "Uuuungh..." Even without movement on Fluttershy's part, her own growth had started to provide her with all the stimulation she needed to keep growing.
It was about that time that Twilight Sparkle showed up. "Anon!" she shouted, landing beside him. She looked to the enormous Fluttershy, still fucking the house into shreds, then back to Anon. "You didn't!"
"Didn't what?" he mumbled, oddly transfixed by the sight before him. It wasn't every day he got to see a pony get this big and this sexy. "I didn't do—"
"You had sex with her, didn't you?" Twilight buried her head in her hooves. "She had to have told you about her condition! She's like an addict! Once she gets growing, she doesn't know when to stop!"
"She, um, might have forgotten to mention some of that," Anon said sheepishly. "Or all of it. How are we supposed to stop her?"
"There's not a lot we can do," Twilight said, as the house exploded into a mound of splinters and gooey Fluttershy cum. "She'll keep getting bigger as long as she's pleasuring herself. The only way she's going to shrink is when she finally tires herself out."
"Oh." Anon pondered that for a minute. In the same minute, Fluttershy sauntered back over and filled her dripping sex with the cum-drenched Town Hall. "That... could take a while. You sure you don't have some kind of crazy magic spell to fix everything?"
"Well, maybe..." A flush spread across Twilight's face as a wave of Fluttershy's heat washed over them. She nodded slowly. "I think I have something that could help, but I'd need a good shot at her, well..." Her blush deepened. "I'd need a good shot at her unmentionables. Can you buy me a minute?"
Anon sighed. There were so many ways this could all go wrong — drowned in an errant blob of cum, or crushed beneath her burgeoning ballsack, or some other impossibly sexy way she could kill him. And for what? A plan that would 'help'?
"Oh, yes!" Fluttershy shuddered as Town Hall crumpled between her thighs, a pool of marecum left where the center of Ponyville's government had once stood. She looked around, eying every next potential fucks. "Which should I choose now? There are just so many options!"
He sighed again. "Okay, I'll do it." He ran up to Fluttershy before she could decide on her next victim, screeching and hollering for all he was worth. "Fluttershy! Fluttershy!"
"Huh?" Fluttershy looked at first to the sides, then looked down. "Oh, Anon!" She stood up and bent her head down to get a better look at him. "I almost didn't see you for a moment! You look so cute and little! What do you want to talk about?" Her eyes lit up. "Did you, um, want to help me out again?"
"I, uh..." Anon gulped as her humid breath, smelling faintly of carrots and her own cum, engulfed him. He couldn't help but notice that the one-eyed snake between her legs was staring right at him, twitching visibly with excitement. It was easily as long as the former Town Hall, and certainly thicker. "I just wanted to ask how you were doing, is all!"
"Oh..." She sounded more than a little disappointed at that, but her face broke out in a warm smile. "Well, I guess I can't complain! I can't even remember the last time I felt this good. Nopony but you ever seems to want to help with that..."
"I can't imagine why," Anon murmured. Out of the corner of his eye, he could see Twilight flying around Fluttershy's blimp-sized flank, angling herself for a good shot. "We should, uh, think about doing it again sometime?"
"I'd like that!" Fluttershy's eyes lit up. "I'd like that so very, very—" A burst of light from behind. The telltale hum of a spell being cast. "mmmmmmmuch!" She gasped as Twilight unloaded a sustained burst of raw magic straight into her winking core. "Ah, ah, oh yes! Right there! More!"
Her eyes rolled back into her head and she immediately surged in size. Anon's vision turned white as her dick unloaded the full contents of her massively productive balls, flooding the streets in a torrent of creamy semen.
"Yes! Yes, yes, yes, yes!" If Fluttershy had only been gigantic before, she was quickly approaching titanic. She doubled in size, and doubled again, and the unending flow of warm, sticky cum easily kept pace. Where before she'd left ponds, she was beginning to leave knee-deep lakes, and if her current pace kept up, it wouldn't be impossible to imagine her leaving a full ocean of goopy white semen. It would have been a lot to clean up even if she'd been normal-sized, but at her enormous stature, the town was simply in danger of drowning beneath her output.
Anon spluttered as he climbed up aboard the town's fountain, one of the last remaining high grounds Fluttershy's cum hadn't overtaken. The ground below him had been fully submerged in her semen, and the rising air was thick with the heady odor of Fluttermusk. The fountain's waters had only barely diluted her potent seed. Still, it was better than nothing. Twilight seemed to agree, as she landed neatly beside him on the fountainhead.
"What did you do?" he asked, his voice nearly drowned out by Fluttershy's screams of pleasure. A fresh blob of piping-hot semen engulfed Sugarcube Corner, the cock itself swiping away a row of nearby houses. "I thought that spell was supposed to help!"
"It did!" Twilight said brightly. "It's a pleasure spell; it'll vibrate the air around her nether regions until she — quite literally — knocks herself out."
"And why exactly would you have a spell like that?"
"No reason..." She looked away. "But the point is that I can vouch for its effectiveness. She should go down in three... two... one..."
"Yeeees!" Fluttershy gave out a scream, long and loud. One more gout of semen geysered up, giving Ponyville its last coat of white, before her knee crumpled beneath her. She fell to the ground with an earthshattering boom and her softening cock flopped against Canterlot Mountain. The final drop of cum welled up from the tip, bubbling up just beneath Canterlot itself.
For a moment, all went silent. Then, once it was clear Fluttershy was down for the count, Anon finally picked his jaw up. "That was honestly the hottest thing I've ever seen in my life."
"Well then I hope it was worth it," Twilight huffed, knocking him in the gut, "because this whole mess was your fault." She gestured over the town of Ponyville, covered from top to bottom in a festive winter white. Her horn glowed, and from nowhere she conjured up a mop and bucket. "So it's your job to clean it. All of it."
Far in the distance, Fluttershy's cock twitched ever so slightly, pumping up just enough cum to flood Canterlot too.
"So you'd better get started."
