Booster Packs (Patreon)

(Contains giantess and hyper growth with lots of collateral)

Commission for Xilimyth

Thanks to T.C. for the prompt idea!

---

The day’s unexpected series of escalating destructive madness originated from one of its most common locations; the bathroom. Something about sitting on a porcelain throne reading a tablet full of self-published stories, with hot coffee in his other hand, was Desmond Fallout’s idea of living a royal lifestyle. Very few routines so effectively relaxed the mind and refreshed the body, while also making the catgirl roommates question his sanitation practices.

It’s a very important state of being for eccentric scientists and inventors. A calm mind can come to conclusions a lot faster than a stressed one. The little squirrel fox only swiped through three pages of a gender bending, breast inflating, short story when his phone’s mandatory intrusive ads popped up despite paying for the service. Such timing ended up being perfect for adding a fresh idea to Desmond’s current train of thought.

“It’s about prrfing time,” Breena muttered the second the door swung open. “I was getting ready to break in to see if you were dead.”

“Sorry about that,” Desmond offered with a blush. “I got a bit caught up in my latest invention.”

It wasn’t a surprise to see the muscular cougar woman waiting outside in a bathrobe. Their meaty thighs were squished together in an awkward stance that made her threat of busting barriers very real. Desmond would have felt bad if his attention wasn’t still focused on his tablet.

“Did you really spend forty prrf minutes doing science on the toilet!?”

“Genius isn’t bound to any one mere laboratory. With this new game we can do card battles with…”

“That’s great! Prrfing move!!”

Brennan didn’t mean to toss Desmond across the living room onto their couch. It’s just not a good idea to get between a looming amazon and the call of nature. By the time her crazy inventor roommate recovered, the bathroom had become locked once more.

“Oh well. I’ll test with her later.” Desmond righted himself on the cushion glad to find his tablet survived his impromptu flight. Some people can’t appreciate inventing a mobile game in under an hour. They didn’t even keep a screwdriver in the bathroom.

Still, Desmond needed a test subject that wasn’t himself. A prayer that was answered with the clicking of heels entering the kitchen.

The more lithe, yet strong in her own right, cheetah roommate marched to their espresso machine dressed all business in a button blouse and skirt. Purple hair expertly pulled back into a ponytail, making it easy to see the zombie stare in her tired eyes. That’d explain why she poured coffee into a large thermos for the upcoming commute.

“Good morning, Dessy,” Xilimyth said, offering the warmest morning smile possible. “If you go out today, can you get more k-cups?”

“Yeah? No problem. I might need to visit someone.” Desmond’s claws tapped a few buttons on his game’s crude interface. “Speaking of which, smile Xili!”

“Wha-gah!? Desmond!” No sooner did she turn than Xilimyth’s eyes were assaulted by a phone camera flash. She recoiled against the counter, looking wide awake. Being blinded by colored spots was the only thing that saved Desmond from immediate retaliation. “What the heck are you doing? Did you take my picture?”

“Sure did,” Desmond beamed, too focused on tapping settings to notice her warning growl. “It’s part of this new game I just made. You can incorporate any photo into a battle token and train it with…”

“Dessy, sorry, but I’m late for work.” Xilimyth sealed her coffee thermos before staggering half blind to get her keys off the foyer rack. “I’ll try it out tonight. Just keep the destruction to a minimum.”

“Yes, kettle, my name is pot,” Desmond retorted, watching Xilimyth’s curvy hips and spotted tail slink out the front door.

Oh well, hopefully the office gives her a stress-free day. Desmond set to work cropping his new photo of a barely groomed and alarmed cheetah woman for his test.

The game concept was nothing many a mobile casino hasn’t already tried before. Players collected character cards with stats that can be trained in a multitude of ways. Naturally, the need to monetize severely capped these things with ridiculous cool down timers.

Desmond’s twist was that he could make a character card out of literally anything. Whether it was the coffee machine or a muscular catgirl fishing orange juice out of the fridge. As long as you had a phone camera, anything was collectable for battles.

But the squirrel-fox could play with a ‘Brenna’ card later. He had a perfect test subject now being processed through the games randomly assigned stat generators. Seconds ticked by, making Desmond note he should hire a designer for a more interesting loading screen. Just as he was ready to scrap the idea and go play Among Us, his phone let out a triumphant fanfare. A card came flying out of a box with showers of confetti to show off Xilimyth’s morning face above blocks of information.

Now, with the admin UI turned on it was time to see how much ‘training’ it’ll take to max out a typical champion. Desmond’s tail twitched in anticipation as he decided to start with feeding his Xilimyth token tons of food. Each little item submission only upped her stats by a fraction of a percentage, so he was going to be hammering his phone for a while.

* * *

“Chirp?” Xilimyth shifted in the driver's seat, reaching around to feel out her lower back. Only smooth leather and soft clothes met her fingers. Nothing remotely threatening that could have triggered the weird jolt near the base of her tail. That might have been a good sign considering last time Desmond borrowed her car a lot of cursed magic stones were left all over the floor. “I didn’t even know Desmond had a license. Ugh?”

Reclining back against the headrest didn’t help the cheetah relax much. After staring at the mother of all red lights a few seconds longer, she suddenly felt a pinching around her shoulders. It filtered down across her plump breasts suddenly filling her rib cage with a soft squeeze. Figures the shuffling would throw off her bra just as the intersection turned green.

One foot eased onto the accelerator. Sharp teeth pressed together barely letting an annoyed sigh hiss between them. It wasn’t that long a commute to work. The stubbornness of feline pride demanded Xili ride out this discomfort until they were off the freeway at least.

That didn’t mean she could easily ignore it. If anything, the straps dug deeper against her shoulders with every yard traveled. Drawing in too big a breath put a lot of pressure on her ribcage only strengthening the cheetah’s annoyance.

Xilimyth remained oblivious of her situation’s subtle clues until her turn off came up three miles later. Hands spun the wheel in their auto-pilot fashion, drawing her elbows close together. When that happened there came a sudden and even sharper pinching in her chest, along with an odd sensation of her arms hugging a pillow.

“What the-uuuuhhhhh!?”

Tires squealed over the long drone of a dumbfounded cheetah. It gave Xilimyth the outside stimulation needed to avoid making a sharp U-turn into a ditch. Even then, her mind was a confused mess of emotions while eyes darted constantly between the road and her chest. Soon as the opening came along, she drove in a reckless abandon in order to bring her trip to a sharp stop at the earliest sidewalk.

Now relatively safe, if triple parked, the cheetah focused everything on the massive bulges swelling out her blouse. Somehow between home and work, her breasts achieved a new level of thickness far surpassing the already DD-cup bra struggling to support them. Speaking of which, the accumulating pressure of the ill-fitting cups on Xilimyth’s lungs broke her away long enough to struggle with the clasp under her clothes.

“Nggghh! Come on!” she seethed, with fingers fumbling over the surprisingly sturdy little metal. Eventually it gave way with a sharp pang, allowing Xilimyth to take a gasp of fresh air before her bust hit the steering wheel. “Gah!”

Damn mammaries were already past the stage of being larger than the cheetah’s head. Most creases along her formerly loose blouse became smoothed over as every inch of fabric was needed to contain them. She could practically see both individual outlines with their increasing size forming more rounded shapes. Buttons pulled tightly puckered before her eyes, allowing glimpses of cleavage and white fur to bulge through the openings.

“C-come on! I have to work,” Xilimyth groaned, not even believing her own attempt at sounding disinterested in her epic swelling. Nipples slowly rose like tents under the taut cotton.

She bit her lower lip with a feline purr, struggling to resist the tender skins unintentional rubbing.

“No. No,” she whispered the word in the air of each labored gasp. It did little to help. Her tits adamantly ignored the command in their desire to block her view of the pedals. “Hmmmm! GAAH!”

The middle three buttons of Xilimyth’s blouse quivered. They managed a grand struggle right until a quick pop sent all three clicking off the windshield. Mounds heavy enough to crush a soda can rushed through the new hole eagerly collecting on the steering wheel. Their weight snapped the bottom button with ease, leaving the last one clasping fabric uselessly around Xilimyth’s neck.

“Oh, crap! Oh, crap!” Xilimyth switched her chanting while trying to cup the soft, furry basketballs. Flesh oozed between her fingers too plush for a good grip. All it did was make her aware that their growth continued against her palms.

“Ow!”

Warmth filtered through Xilimyth’s breasts across her body, causing her tail to shiver. A second later, she experienced a sharp headbutt into the car’s ceiling. As stars danced across her vision, it became clear fast that her sagging milkers were no longer the only thing growing.

“Craaaaaaaap!!” Xilimyth squished over her own chest in a struggle to open the driver's door. She could feel her butt plumping into the seat cushions, the skirt around it crawling along to expose swelling spotted thighs.

Having steadily growing hands also made it tricky to work a latch that was tiny to begin with. Xilimyth barely wiggled her pinky into its hole in order to get a relieving click.

The tumble out onto cold pavement was not the cheetah’s most dignified moment. At least Xilimyth landed on her bust, which reached a point of girth to support her two feet off the ground. Not having her nose smashed was only a minor comfort when her skirt pushed up in time to flash another car pulling into the parking lot with her growing butt. The pink panties underneath were barely visible sunken between the spotted cheeks.

Using the utmost care, Xilimyth put one foot under her and pushed herself upright. Even then, the act of standing hit her with a rush of vertigo. She staggered with a meek howl, slamming one hand on the car roof for support. The struts bounced harshly with the weight but remained stable.

Placed beside her vehicle gave the alarmed cheetah a good sense of scale. She must have rocketed to a good twelve feet tall. No way her body could get back into that seat if she wanted an escape.

That was without taking the other kinds of growth into account. Xilimyth paced around the parking lot on bare feet, distracted by the shaking and bouncing of curves much thicker than when she woke up.

Dainty paws had long since crushed their heels flat. Stockings tore in jagged patterns, trying to cling to spotted legs. Xilimyth’s skirt barely covered half her broadened hips, leaving the lower half of a fattened butt exposed. Trying to tug it back down only caused more tears in the fabric.

Yet it was her feline tits that stole the towering show. Growing double her height only marginally worked to ‘even’ out those giant mounds. She tried to cup the fluffy white globes to gauge their weight. Each one felt amazingly full, yet easily squished around her arms. It was almost funny when her bra fluttered out from the fold of their hang. Shame the breeze across Xilimyth’s stretched pink nipples took a serious priority.

At least whatever force felt like enlarging a random programmer girl into a tower of thickness seemed satisfied. She covered whatever boob surface her hands could manage in an awkward shuffle between other parked cars. Reaching the office was tight enough between the spaces. Now Xilimyth was sure her rack could crush a hood if she wasn’t careful.

“Morning, Xilimyth. You ready for the... whoa!” The receptionist wouldn’t have bothered looking up from his book if not for the soft cracking of glass. Crawling through the double doors on all fours towards the calico was the tallest, busiest woman he’d ever witnessed. Both breasts and hips had to be forcibly squeezed through the seven foot wide frame, cracking the adjoining windows from the force.

“In my defense, no one could have been ready for my day,” Xilimyth grumbled in an attempt at dry humor. The reception area had a high enough roof that she could stand with only a slight hunch. Getting further in at her office would be a lot tricker.

“Are you going to need a sick day, or something?” the receptionist offered, unable to stop his nose from bleeding. At this proximity, it was near impossible to see the cheetah’s face beyond the peak of her gently swaying bust.

A position Xilimyth was far too big to care about herself anymore. What remained of her blouse couldn’t hope to be anything but a tiny cape. “Y-yeah? I somehow doubt becoming a giant will even phase those prudes into time off.”

* * *

Back at the condo, Desmond leaned on the bathroom sink groaning from how the flow of cold water soothed his aching thumbs. That had been a ton more item boosting than he had originally expected. Even for a mobile game, he should probably dial it back a bit, or maybe increase the overall stat inclines. Otherwise, it’d take an eternity for Xilimyth’s card to finally cap off.

Once his finger joints finally recovered from excessive phone tapping, he still had to return to the stupid device for more testing. Now seemed a perfect time to give the traits loot boxes a spin. Another fun idea Desmond had to keep card customization interesting on any rarity. For a few bucks, each card could get up to three random power ups for all kinds of unique builds.

Of course, it cost money to get undesired buffs removed. That’d been implemented at the request of publishers.

But who needs cash with the admin controls? That thought set Desmond gleefully down the path to opening one lazily made loot box after another. Blasts of music and confetti needed a bit more work. There was barely enough to make each unboxing interesting beyond what actually came out.

“Minotaur’s Bounty? Plus three-hundred percent production?” Desmond read one trait aloud with his eyebrow cocked. “Does that actually do something, or was I just horny at the time?”

With a shrug, the squirrel-fox confirmed the traits application. Watching the text weld itself in a graphic animation on Xilimyth’s card is definitely one of the more impressive displays in the game so far.

* * *

“Oh nyaaaah!” Xilimyth cried out when a sudden heat packed into her titanic breasts. Eyes and hands flew to the hanging mounds in a dead panic, kneading their fine fur in a desperate attempt to combat the disruption. It did little to ease the rapid pulsing of little things deep within.

Dozens of glands worked like water pumps to rapidly fill the cheetah’s chest with a mounting pressure. Slowly, the soft, plush texture became firm against her fingers. Flesh groaned as it was pulled taut, retracting the mounds slightly out of their deep hang. With a gasp, her areolas gave off a loud pop, becoming little puffed capstones to the mountain peaks.

Xilimyth only nudged her nipple gingerly with a finger, curious about its puffed state. That was more than enough to break what weak blockage remained. A quiver of release sent pleasure rushing down her spine into her nethers. Red coated the cheetah’s muzzle in her mix of arousal and alarm to see thick milk rush out of her breast and splash everything off the receptionist’s desk. “Oh, you g-got to be kidding m-me! Nya! Watch out!”

Pressure surged in her other mound, but trying to clamp on its nipple only squeezed an even bigger burst of milk directly at the stupefied calico. She sputtered rapid apologies that probably didn’t reach the poor guy anymore. He seemed content to just stay in the corner the blast knocked him into and take a short nap about bouncing feline boobs.

“N-no! No more! Please,” Xilimyth cried, although her resistance was betrayed by the purring lust in her tone. She fell onto hands and knees with her spotted tail raised high into the air, drawing attention to the arousal staining her panties. Their breasts didn’t even need help anymore. Combined throbs in both her pectoral muscles and milk glands worked as an almost automated milker.

Her hefty mounds squashed against the office floor firing one thick geyser of milk after another. Groans came out more like feral yowls of pleasure that echoed through the building. People learned too late it was a bad idea to open doors to check on all the racket. Milk plowed into whatever open space it could find, raising levels up to people’s ankles with no sign of stopping.

* * *

“Well, I made a really boring game,” Desmond muttered. Hopefully, he could find someone to do better graphics and maybe rework the battle system. With the way things looked, it’d take literally thousands in cash to max out a common card like Xilimyth. Trying to do the same thing with higher rarities would probably be much worse.

Speaking of which, he still had that final system to test out. He wanted desperately to offer an alternative to getting rare drops, so set it up that combining three of the same cards would upgrade it to the next tier. Of course, the publisher had to make it ridiculous and pushed back for five of the same card. Whatever it takes to make money for the fun experiments.

“Whoa!” Desmond blinked upon watching the graphics of five Xilimyth duplicates spin and combine to an uncommon rarity. It didn’t impress him as much as watching Xilimyth’s stats double, or even triple, their numbers. Now there’s a boost that’d be worth some investing.

He couldn’t wait to see how much the cheetah would increase at a rare tier.

* * *

“Oh, come on!” Xilimyth cried into the floor when another alien force washed over her trembling curves.

Not a moment later she found herself slipping and sliding on the pool of milk her bounty of boobs continued to pour out around her. This was no act of clumsy neglect on her part. Everything just resumed growing at once. Her form stretched to fill the reception area, knocking away desks and chairs. A pinch against her feet lasted about a second before paw pads shattered the entire front windows, allowing her bloating ass to make a safe exit into the parking lot.

Arms slammed against the opposite wall with Xilimyth recoiling to avoid face planting into it. The cheap plywood stood no chance against hands reaching the size of pickup trucks and toppled to pieces without resistance. She almost felt bad upon crashing into a meeting room she was supposed to have taken part in twenty minutes ago. But since it was mostly occupied by mouth breathers that knew enough about programming to completely mess up the most basic of code, rolling them over with leaking cheetah tits was probably the nicest thing she could do to them.

They certainly didn’t seem to mind when her growth carried her furry blimps past them. Most just floated in the two foot deep milk with goofy grins on their faces.

“I’m sorry for everything I’m breaking!” Xilimyth got out before her head had nowhere else to go but up. By that point, she was so big simply recovering back onto hands and knees would have taken out the whole roof anyway. A feat she did slowly, with deliberate hip shaking to make sure the debris slid off her richly firmed back away from ogling onlookers.

“Nggghhh! No way!” The thought of removing herself from what remained of the office building occurred to Xilimyth, just not in time for another hard shift that forced her to remain on all fours.

Technically, the cheetah started moving away from her place of employment. Hands crashed through the far walls, with her breasts rolling over what walls remained. Palms dug little trenches through the pavement on the impromptu journey through the city sector, giving way for rivers of milk to flow in.

Somehow, those mammaries of Xilimyth not only remained the biggest part of her growing body, but were also outpacing it. Their firm mass pressed hard into the ground, filling parking lots and streets with creamy lactose. Cleavage bulged between her growing arms with even more snowy flesh spilling around her curvy waist.

That was all too distracting for the cheetah to barely notice how her paw-feet were kicking out cars and sending trash cans flying. Her legs and butt’s journey across the parking was filled with untold vehicular damages before finally meeting more commercial buildings across the street. Many a workplace became disrupted with the sudden toes and paw pads crashing through Kool-aid man style. Those that didn’t evacuate through the various holes Xilimyth’s spotted legs provided were forced out by the incoming girth of her posterior.

“It’s not stopping!” Xilimyth squeaked, looking from her quivering breasts the size of the surrounding buildings to the equally sized rise of her butt. The pause between surges barely lasted a few seconds before her muscles tensed and everything resumed its growing rampage. “Why isn’t it stopping? Oh nya! Someone h-help?”

All the rumbling and explosions became an interesting spectacle to the denizens of Washington. From the east coast, people watched Xilimyth spotted tail snake its way through the sky, causing clouds to swirl apart with every flick. Her legs became spread enough to avoid most damages when her feet started digging their claws through Seattle streets for the mother of all potholes. Most were stuck fixated on her bouncing furry rump looming to blot out the sun in most areas. The implications of danger didn’t even hit until those cheetah cheeks started squishing their way over and between skyscrapers, much to the determination of the structures.

The west side of the state, and the country as a whole, arguably had it stranger. Valley farmers were first confused by the sounds of a panicked female voice rumbling like thunder overhead. It wasn’t too long they could spot the source with Xilimyth’s giant head rising over the mountain tops. Her face still looked around and back at her unstoppable swelling body in a panic. From a distance, many thought it was a projected image filling up the sky, but then they noticed the other swelling mountains of white fur shoving their way over rocky terrain. Snow fell from the mountains before the cheetah’s breasts spilled across the peaks into the valleys beyond. What everyone thought were avalanches falling around her hill-sized nipples were quickly realized as massive waterfalls of milk. Rivers were soon running creamy white before flooding their banks in a rush to fill the valley.

Before long, Xilimyth was too big to barely recognize geography. A colder wet feeling at her toes meant she probably reached the Pacific. Meanwhile, she was pretty sure her breasts touched Idaho and were giving Montana a light lactose rain.

* * *

“There! Finally maxed it all out.” Despite Desmond’s word he stared at his phone with nothing but contempt. All this testing for a mobile game made him realize just how much he hated the legal money scams. Still, he got his Xilimyth card to its maximum mega-rare tier and the stats for it didn’t look too bad. It’d certainly keep people interested in powering up their friends, but at a really insane cost. Maybe he could get away with lowering the timers between ‘feeding’ periods.

A light thumping of footsteps drew his attention to Brenna entering the living room. The cougar scanned her eyes into a lock on Desmond. He knew that brow furrowed stare all too well. It asked the very familiar question before her muzzle moved.

“What the prrf did you do now!?”

Desmond blinked, unable to help give a sly smile. “You’ll have to be more specific, Brenna. Science requires a lot of work.”

Brenna’s nostrils flared in a no-nonsense fashion, prompting Desmond to backtrack.

“I do not know what you mean. I’ve just been here testing my game.”

“Well prrf! Try putting the news on or check twitter more often.” Brenna rushed over to the far window. The part of their condo that had a great view of Seattle’s bay a few miles away. “Or, you know, look at THAT!”

Confusion filled Desmond as he got up to join Brenna’s side. Outside seemed normal until he realized half of Seattle seemed to be missing. In its place was some large mountainous structure covered with white grass along the bottom, going up into yellow and black spotted forests. He followed the lights and whirls of emergency cars and helicopters along to the coast. Several rounder protrusions from the mountain shifted slightly to the effect of high tidal splashes flooding the beach areas.

“...is...is that a foot?” Desmond’s eyebrows shot up to his ears upon recognizing the curved shape of feline claws on each enormous digit.

“Yup. That’s Xilimyth.” Brenna gave a deep sigh while pulling out her phone. “There’s a satellite photo of her going all the way to Wisconsin. Look!”

One look at the cougar’s phone display got Desmond whistling with a big grin. “Holy hell, she got some great tits this time.” Brenna’s scowl changed his tune again. “Also, that’s a heck of a lot of milk. They might have to rename the great lakes after her.”

“Assuming you can undo whatever you did to her?”

“Why do you always assume it’s me?” It was Desmond’s turn to be annoyed. “I told you, the only thing I’ve done all day is test my game with Xilimyth’s… photo?”

Desmond glanced at his own phone, ignoring Brenna’s accusingly raised eyebrow. The gears slowly turned in the squirrel-fox’s head, unable to understand why the game and cheetah growth events correlated. Maybe it had something to do with his publisher being founded by kinky witches, but that might be a stretch.

Still, a smile grew to show his teeth at the notion this would need further testing.

“Hey, Brenna. Smile!”

“What? PRRF!!” The cougar saw Desmond whip his phone around, but couldn’t react before the flash filled her vision with blinding lights. All Brenna could do was stagger against the window, hearing her roommate giggle in that way she knew would lead to a bad evening.