I used NovelAI's unlimited gen membership for $25 a month. Note that "unlimited" is kind of a lie, it's only unlimited if you're under a certain resolution and only if you're not using any of the advanced features. Upscaling and other features cost the on-site currency, which the membership gets you 10000 a month. That should be more than enough for a month, but you can burn through it quickly since NAI gens so quickly.

Katt Monroe strutted through the dimly lit corridor of the space station, her hips swaying with that signature confident swagger. The pink feline pilot felt a strange, warm tingle spreading across her chest, making her yellow crop top feel unusually tight. “Hmm? What’s this feeling~?” she purred to herself, her blue eyes sparkling with curiosity as she cupped her breasts experimentally. They were already nicely full and perky, but something was definitely happening.

Suddenly, a powerful surge of heat flooded her body. “Ooh~! W-what the—?!” Katt gasped as her breasts began to swell. The soft, heavy flesh pushed outward, stretching the fabric of her top with a satisfying *wubba* sound. She squeezed them gently, feeling them grow warmer and heavier in her hands. “Mmmhh… they’re getting bigger… and it feels so good~!”

The growth accelerated. Her breasts ballooned outward, round and full, straining hard against the yellow material. The sensation was electric — every inch of expansion sent waves of tingling pleasure through her sensitive nipples, which stiffened into hard pink peaks that poked obviously through the fabric. Katt’s tail flicked wildly behind her as she leaned back against the wall, breathing heavier. “Ahhn~! They’re so sensitive… I can feel them getting heavier… so full and soft…”

She moaned louder as another powerful pulse hit. *Growww~* Her breasts surged dramatically larger, now easily twice their original size, heavy and bouncy. The weight pulled deliciously on her chest, making her arch her back. Sweat began to bead on her pink fur as her body heated up. The soft *jiggle-jiggle* of her swelling tits filled the corridor with lewd sounds. “Fuuuck~ Look at them! They’re getting so huge… I love it! Don’t stop growing for me, babies~”

Katt’s hands couldn’t even fully cover them anymore. She kneaded the massive, expanding orbs, thumbs circling her aching nipples as pleasure sparked through her like fireworks. Her pussy was soaked, thighs rubbing together as clear arousal dripped down her legs. The scent of her own feminine heat mixed with the faint metallic smell of the spaceship corridor. “Haaah~! They’re so big now… so heavy and sensitive… every little movement makes them bounce and it feels amazing~!”

Another intense wave crashed over her. *BYOING!* Her breasts exploded in size, becoming hyper-massive, impossibly round and perfectly perky despite their enormous weight. They strained violently against her top, the fabric creaking dangerously as deep cleavage spilled out. Katt’s eyes rolled back slightly, tongue slipping out in bliss as overwhelming pleasure flooded her nervous system. “Oooohhh my goood~! They’re gigantic! Look how huge my tits are getting! I’m such a naughty kitty~!”

She dropped to her knees, moaning shamelessly as she hugged her colossal breasts, burying her face between the warm, soft, pillowy flesh. The sensation of her own massive tits smothering her cheeks made her shiver with delight. Her nipples were hypersensitive now — just the brush of fabric against them sent jolts straight to her dripping cunt. “Mmmph~! They’re so warm… so soft… I can’t stop touching them! They feel better the bigger they get~!”

The final, most powerful surge hit her like a supernova. *BYOING! BYOING!* Katt’s breasts ballooned to absurd, hyper proportions — bigger than her own head, impossibly round, glossy, and impossibly perfect. The growth was so intense that her top finally gave up, buttons flying off as her massive pink tits burst free, jiggling heavily with every breath. The rush of cool air on her overheated skin made her cry out in ecstasy.

“Ahhhh~! Yes! Yes! They’re so fucking huge now! I’m such a big-titted slutty cat~!” Katt moaned loudly, completely lost in pleasure. She pinched and twisted her fat, sensitive nipples, sending lightning bolts of pure bliss shooting through her body. Her pussy clenched hard, dripping steadily onto the floor as an earth-shattering orgasm built deep inside her.

“I’m gonna cum… just from my tits growing so big~! Oh fuck, I’m cumming— I’m cumming so haaaard~!!!”

Katt threw her head back, white hair tousled, tongue hanging out in a perfect ahegao expression as the climax finally hit. Her entire body convulsed violently. Her massive breasts bounced and jiggled wildly as powerful waves of pleasure ripped through her. Her pussy spasmed hard, squirting clear, hot girl-cum all over the floor in long, messy arcs while she screamed in pure euphoric bliss.

“HNNNGH~! CUMMING! I’M CUMMING FROM MY HUGE TITS~!!!”

The orgasm seemed to last forever, each pulse making her hyper breasts bounce and her body shake. When it finally began to subside, Katt collapsed forward, panting heavily, her enormous new breasts squishing softly beneath her as she lay in a puddle of her own juices. A blissful, satisfied smile spread across her face as she gently caressed her still-tingling, massively expanded chest.

“Mmmhh… best… growth spurt… ever~” she purred dreamily, eyes half-lidded in afterglow. “I wonder what else on me can grow next…?”

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Katt Monroe licked her lips, already fantasizing about the next thrilling transformation, her gigantic, perfect breasts rising and falling with every happy, satisfied breath.