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Endless Curves: An Erotic Story of Expansion, Clones, and Giantess Growth

In the beginning, there was the word—and the word was booty.

Free Ass Expansion Story Sample Below

Endless Curves Cover

Penny never hid her love for bodacious women. Even so, she gets more than she bargained for when Chai turns out to be a bona-fide goddess of curves, barely getting her into bed before she’s outgrown it. Happily for Penny, being caught beneath a buxom giantess is exactly what she’s into! And she’s determined to satisfy her towering lover, even as she outgrows the building, the city, and the whole damn island.

Can Penny handle a woman the size of a mountain? Or five of her at once? How does Penny react to becoming a curvaceous divinity herself? And what happens when Chai’s backside grows bigger than everything?

This 8,300 word story contains: F/f, FFF+/f, Butt Expansion (Mild to Macro), Giantess Growth (Mini to Cosmic), Smothering, Facesitting, Clones, Transformation, Ascension.

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Endless Curves

An Erotic Story of Expansion, Clones, and Giantess Growth

“Chai?”

“Yes, Penny?”

“Did you know that you have an amazing ass?”

“I do. But please, continue.”

“As if you could stop me. It deserves too much praise. Let me count the ways…”

They made for a cute pair, Penny and Chai. Short and tall, limber and buxom, cat and bunny-kin (that is, humans with the ears, tails, and intrinsic cuteness of their respective animals). Penny had short hair the color of fire and a smile to match, while Chai’s dark tresses were worn long and elegant. They were adventurers, obviously. Who else wore their armor so daring and fashionably revealing? And they had plenty of toned physique and rounded curves to reveal. Even Penny, the more petite of the pair, was far from flat. Only in comparison to Chai, in fact, did her figure pale. But nobody could stand up to Chai’s height, her chest, or her huge, round butt. Penny didn’t mind; it only gave her more delightfully thick bunny to touch and tease as they ambled through town, arms slung around each other.

It was a lovely day, not a cloud in sight. No impending catastrophe, either, which gave the part-time heroines all the time in the world to relax and take in the sights. The waterfront, the beach, and—of course—each other. The sun was out, hot and bright, and yet it didn’t hold a candle to the lustful looks exchanged between the two women. The life of an adventurer was quick and passionate, and their relationships doubly so.

“Well?” Chai demanded, eyebrow playfully cocked, as she waited for the catgirl to enumerate the merits of her backside.

“Where to start? You’ve got the perfect peach. Big, round, shapely. With a serious underlining of big! I could just lose myself in watching it jiggle as you walk. To say nothing about how its heft and oh so squeezable softness calls out to me…”

“Sounds like you’re angling to cut the scenic tour short and head straight to the bedroom.”

“I’ve been patient so far, haven’t I?”

“Patient—or maybe just weighing up the risks. Can you even handle an ass like mine?”

“I can handle anything,” Penny replied, flashing a shrewd grin. She placed her hand on Chai’s hip, teasing the line of bulging hip through the distressed fabric of her short leggings.

“As long as you know what you’re getting into. I wouldn’t want to sit on your pretty face only to find that you’re getting cold feet.” Chai tilted herself into Penny’s grip, filling her palm. “Not that any part of you is really capable of getting cold if I’m on top.”

“All the better. I don’t intend on making you want to leave. Not until I get to cover that glorious booty that you keep wiggling at me with kisses. I look forward to seeing if it looks even bigger up close.”

Chai bit her lip. “Oh boy, will it,” she muttered—and thrust out her ass for what came next.

Penny slapped the bunnygirl’s enormous butt—her sensitive ears picking up the almost inaudible moan that came, somehow, half a second before impact—and was treated to a wonderful sight: Chai’s huge backside… swelling bigger in her hand. There couldn’t be any doubt about it. No trick of the light or wishful thinking. Chai’s backside plainly expanded, becoming even more improbably bootylicious with a sudden, surging bwoomph!

“Huh. That’s new,” Penny commented, understandably enthralled by this new phenomenon, though not so shocked that she removed her hand from the overflowing bounty of bunny butt. Sure, magic was commonplace, but Chai was no mage, and she had never showed off this particular skill before.

The owner of said butt, meanwhile, also had a distracted air about her. But where showed surprise, Chai’s expression turned downright steamy, her cheeks flushing and her voluptuous lips parting suggestively as she gave her companion an intense look. “What do you think?”

“What do I think? I think it’s fantastic! Ass-tastic, even! Can you do it again?”

Chai’s smile grew. As did the rest of her.

“That’s the right answer.” Her voice was deep and sultry, punctuated by the popping of the stitchings of her bottoms as her ass fattened right into Penny’s increasingly inadequate palm. It wasn’t until Penny peeled her attention away from it to look up that she discovered that Chai had grown taller, too, leaving the catgirl solidly at the height of her hefty chest. And though she was anything but psychic, Penny felt in her bones—or more adequately, in her clit—that she had but scratched the surface.

“We should find a room,” Chai rumbled. “Now.”

***

They made it as far as the second floor.

Then, just as the lock to their shared room clicked open and Chai started inside, Penny gave in to temptation and squeezed the fat, sexy ass that had been swaying in front of her all the way there, but especially up the stairs. More, Chai’s growing height put her backside nearly at the level of Penny’s face; no wonder the redhead succumbed to shoving her face into it.

It was more than Chai, already struggling to keep herself composed, could manage. She bit her lip, tensed up… and finally, as she felt Penny’s extraordinarily nimble hands exploring her, lost control.

The result? An explosion of butt, as sudden as it was powerful. The rapid expansion of her hips wedged left the breathtakingly bottom-heavy bunnygirl in the door frame, too buxom to enter or leave. At least without an undignified (if entertaining) display of shimmying.

“Penny!” Chai exclaimed, breathing sharply through her teeth.

“Yes? Need some help pushing you through?” Penny purred, running her hands lovingly over Chai’s heart-shaped backside, encouraging it to overwhelm her already struggling shorts. The hints of naked skin that showed through the tearing fabric and popping stitches only made her more irresistible to Penny’s adventurous figures, positively magnetic for her affection.

“That’s not quite what I had in mind. At least, not before we’re in private. On the other hand…” She looked down over her shoulder, shivering softly as her ass blew up again, openly bending the door frames around its soft, shapely mass. She had to hunch over, now, lest her head crack against the ceiling, and her top fared no better against her growing curves than the rest of her outfit.

“Yes?” Penny murmured distractedly, never once taking her eyes off Chai’s disintegrating hotpants. “How many hands do you need? You can have both of mine.”

“Oh, you’ll need them, and more,” Chai said. “As I was saying, I meant to be discreet. But putting on a show is probably inevitable. Especially with how ambitious you’re getting.”

“That a complaint all of a sudden?”

“Not at all. Keep touching my butt. You’ll just have to deal with the consequences.”

Penny flashed her wicked smile. “I can deal with any—”

Then Chai shoved Penny against the wall behind her, hips leading the charge as her enormous ass grew even bigger, swelling as if it meant to fill the hallway itself and utterly burying the catgirl in warm, shapely curves. In the process, her clothes finally gave up the ghost, tearing off her magnificent form and leaving only the finest naked bunnygirl behind, a burgeoning giantess with enough curves for ten of her kind.

“Ah, what a relief. Don’t you think, Penny? Mh, you certainly feel nice, wriggling like that…” Chai had sunk to her knees now, too tall to even think of going around inside the building on anything but all fours. Her hips would never fit through any door in there, by now, but with her head and shoulders stuck firmly inside their rented room and her bottom flaring out on the other side, there was only ever going to be one way that she left the establishment: in itty bitty pieces beneath her.

Penny, for her part, coped well with her situation. Not just anyone could react so quickly to being smothered in godlike ass, but the deft redhead rode the wave, hugging Chai’s massive thighs as she peppered her butt with kisses. She had rather hoped for something like that, after all, even if she wasn’t sure how much size she could really tease out of Chai. Fortunately for both, the answer—‘more than expected’—was exactly what both of them wanted.

“Glad you agree. Too late to back out now,” Chai laughed, slowly grinding her hips from side to side. “I’ll just make myself comfortable, if you don’t mind.” She reached into the room and dragged the bed closer, though the double-sized mattress worked as little more than a boob-rest for the nascent goddess; she was still getting taller, sharing the spurts with her greedily growing backside, which led to the poor door frame cracking and splintering around her surprisingly slender waist. But her steady ascension to giantess-hood remained secondary to the unstoppable expansion of her hips and thighs, her ass charging onwards like a runaway train to gobble up the enthusiastic Penny in its all-encompassing curves. Even without Chai growing to three times her height, it would’ve enveloped her utterly.

Penny said as much between kisses— or tried to,the mass of booty rather muffled her voice—amid the creaking and rumbling of splintering timber.

“What’s that, love? You want more ass?” Chai giggled. “Tap once for yes, twice for no.”

The din of the collapsing building only increased in volume, but anyone would’ve heard the single solid spank that Penny delivered.

Moaning briefly, Chai turned her head and laughed. “I’m just teasing. I can hear you perfectly well.” She bit her lip. “Hold on tight…”

There wasn’t any more space to give. Her curves filled the narrow corridor to completion, ass and thighs wedged in from floor to ceiling. Their room lasted slightly longer, if only because her tits didn’t grow as aggressively as her butt. But now, with that encouraging clap and the catgirl’s continuous, covetous touches, the time had come to transcend these limitations. Chai raised her hips—and the roof—before letting them fall back down onto the happy redhead, even bigger than before. And bigger. And bigger.

The wall shifted, groaned, and finally collapsed around Chai’s tremendous booty. She grew right through the building, her butt bulging outwards in ever grander, rounder shapes. Then the floor sagged and the structures confining her waist and front gave away, as the interior of the two-story inn fell apart around the bunnygirl’s unstoppable body. Wood splintered, paint cracked, and furniture turned to nothing but sticks and dust. And yet not a hint of discomfort crossed her features; she felt only warm, syrupy lust, gasping excitedly as she let go and gave in to the seductive size hidden inside her.

Penny, too, got her fill: enveloped fully in the divine warmth of her lover’s ass, she sank into the depths of her soft thighs and cheeks, blessed with the sights and scents of Chai’s plump, sopping pussy, which drove her to worship the towering redhead with greater fervor.

It went as it must. Chai emerged from the crumbling inn, shedding the tiled roof and outer walls like a second skin, her dusky, overwhelmingly feminine figure emerging from the rubble with a satisfying stretch. There were shouts and stares, but no panic of consequence; she was in full goddess-mode now and not a soul could doubt that. Least of all the lucky redhead beneath her.

“So,” the 30-foot tall bunnygirl started, shifting in place to deposit Penny safely on a piece of rubble before moving back so that the catgirl sat between her legs, with a line of sight to her face. Penny ought to see her face directly, not only in her mind’s eye, and be thrilled by her suggestively raised eyebrow and her foxy smile as she continued, in her booming, sultry voice, “Now that we’re done with the foreplay…”

###

If you liked this story, you may enjoy Zara Starfinder and the Giantess Core.

Or check out more erotic giantess stories in the catalog.

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