giantess animal crossing
(Contains giantess growth, hourglass expansion, and probably the first animal crossing character you thought of.)

The monster roared.
"Please?" Isabelle sighed. "We're almost done, you can wait, it’ll be just a little longer..."
The long-legged dog girl scribbled in her clipboard across the utterly empty beach, noting down the sand's consistency.
"Compact and drains well, the island's soil should be more than stable enough for Nook Inc. homes and struct-"
Another roar cut her off, so loud and intense she felt her whole body shake. Isabelle clutched at her belly with a wince, stroking and soothing it through the fabric of her company-provided polo shirt.
“Okay! You win! We’ll look for mangos or something first.” She conceded, tucking her pen away. “Why did I have to leave my lunch on the main island…”
Leaving the sand and a trail of paw prints behind her, Isabelle left the beach for the island’s center, soon surrounded by tropical groves. Hopefully, she looked up at their branches, heart soaring as she saw ripe, plump fruit!...that was hanging several feet above her head. She’d never been particularly great at tree-climbing, and she didn’t particularly want to risk falling from the height she’d need to climb just to reach the fruit. Somewhat grudgingly, she jotted it down in her notes. Natural resources she couldn’t even touch might be a plus for Nook inc at least. Sigh.
Isabelle found herself recording more of the island as she walked along, which included some abnormally large butterflies (which scared Isabelle only a little bit) a small stream of freshwater, (which she drank her fill from and hopped across, legs not quite long enough to step over it entirely) and a tall, isolated tree, it’s branches filled with unusual, brightly colored-
“Fruit!” Isabelle cheered, rushing to its trunk.
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To her delight, they were actually within reach this time. Not even caring what they were, Isabelle tore one down and sunk her teeth into it’s skin. At her bite, juice unexpectedly burst out of it, splashing onto her her face, her skirt, the flat, bumpless plain of her chest, and even a stray little beetle, scuttling across the grass.
“Sorry, little guy.” She apologized guiltily, juice still running down her cheek. 
Hoping it wouldn’t stain or soak through to her blouse, she hurriedly whipped out a handkerchief from her shirt’s pocket. In between further bites of the mysterious, mango-like fruit’s brightly colored flesh, she wiped down her clothes and fur, (she sensed the beetle wouldn’t appreciate her assistance) managing to avoid any further juice explosions.
She polished off the last of both stain and fruit, musing over it as she chewed. It was acidic, like an orange, making her tongue tingle with every bite. The skin had been supple and thin, breaking easily, the taste of it’s flesh like sweet sweet honey…
Isabelle jumped. Something heavy was trundling over her paw, poking and tickling her. She looked down and immediately leapt back, a beetle bigger than her entire paw squirming over it. Hurriedly she shooed it off, unnerved by its size. That had to be a different beetle, right? Or some exotic new species that swelled with liquid? Neither made much sense...and neither did what was going on with her paw.
Before her very eyes it seemed to swell. She rubbed her eyes, , but when she opened them again she’d only gotten bigger. Was the beetle poisonous? Giving her some kind of allergic reaction?
SNAP
Her attention was drug away from her left paw to her right, suddenly crushing a sturdy stick she’d been standing on. That didn’t make sense, the beetle hadn’t even touched that paw! She shifted uncomfortably, her clothes randomly becoming tight. Her hands went to her chest, ready to adjust a button or two, only to collide with something...soft. Isabelle’s eyes bulged, matching her other bulging pair of orbs. Her meager chest had grown to a modest one, flat landscape of her chest now dotted with two rising hills, ever so slightly stretching more every second.
Panic starting to creep in, the dog girl hugged her clipboard to her chest, almost as if to keep her breasts from getting any larger, than took off, paws pounding heavily across the ground. She wasn’t sure what she was running from, but she decided she want to get on her Nook inc. motorboat and off this island as soon as possible.
She reached the stream again, only remembering she needed to leap across it when she was already stretching her leg over it. She braced herself, preparing to stumble and trip into the cold water, only for her paw to touch down on grass. She looked over herself in shock, legs long and lengthened, easily reaching from one side of the stream to the other. More unnerved than relieved, she quickly hurried the rest of the way across. She couldn’t stop glancing back at the stream as she ran...or at least, that’s what she was glancing at at first.
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Her eyes traveled from the water to her skirt, long legs sticking out of it, making it look smaller. Except they weren’t the only things making it look smaller anymore, the fabric clearly stretching over the bulge of her butt, swelling up to a skirt-straining trunk, her tail providing a visible, consistent comparison to its growth. She was so busy ogling her backside, she didn’t even notice the branch until she walked into it.
“OW!”
Fruit fell from the impact of her face and the wood...familiar fruit. Isabelle stared down at them with shock, looming over it from far above. This was the same fruit that had been overhead earlier. The same fruit she’d grumbled about not being able to even touch...
She gulped. Now that she could reach it, she found she REALLY did not want it anymore. She stepped over it, not being able to help noticing just how drastically smaller it was compared to her paw.
Isabelle burst free of the trees, getting caught on foliage that she hadn’t even noticed going in earlier. With strength that surprised her most of all, she tore through it, sending her clipboard flying, making her officially busty chest bounce out. A button shot off into the air at breakneck speeds, but she couldn’t care about that now. All she could think about was the boat.
Abandoning her clipboard and leaving large paw prints that completely swallowed and decimated the smaller ones she’d left prior, Isabelle sprinted for the boat, long legs getting her across the beach in record time. She hopped on board the one-animal watercraft, making it give an ominous creak at her weight.
She gripped the wheel with both paws, practically engulfing it. She soon found that that didn’t matter however, because upon tugging a lever, the whole stick snapped off in her hands...but even that wouldn’t matter because, with another surge and another button firing off her top and plinking into the ocean forever, she found her breasts so swollen and rounded they completely buried the controls in fluffy yellow-furred mammaries...but she found even THAT didn’t matter, because her heavy paws had just busted through the floor of the boat entirely. She gasped as cold water washed over her legs and waist, more and more of her sinking in as she grew, gradually smashing the boat to bits. She flailed and coughed, fear overtaking her...only for her paws to touch the seafloor.
She stood up, only shoulders-deep in the ocean and steadily rising out of it, a few inches of height and curves at a time. She trudged back to shore defeatedly, stopping only once. Her creaking skirt was so stuffed with fat, squishy Isabelle thigh that she couldn’t move, tree trunk shaming pillars of yellow smishing and smashing together in plush, immobilizing collisions until her skirt finally burst. She ignored the fabric now floating on the water’s surface; it wasn’t exactly useful to her now.
Isabelle dragged her tree-looming body back onto the beach, stepping from shore to sand like a stepstool. With a burst of sand, her skirtless posterior crashed down, panties hanging on by an all too literal thread. Isabelle sighed, looking over herself. Quintupled in height, bare legs far longer than every hallway in her home combined, arms big enough to hug said home, and a massive rack that would put a squishy blockade on any thoughts of an embrace. They were head-outsizing balloons of yellow, bra and most of her buttons lost somewhere during the chaos, only a single, miraculous one remaining, her Nook inc. uniform digging into the middle of her vast bosom, revealing a scandalous amount of yellow-furred underboob, cleavage, and of course, her entire midriff.
“Well, I’m on a tropical island, my clothes have basically turned into a bikini, and I’m on a beach with nothing to do but relax.” Isabelle surmised, eyeing her straining button. “I guess I’m finally on vacation…”
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Her eyes narrowed. You know what, she WAS on vacation. She was going to make the most of this opportunity, she was going to enjoy herself, she was going to RELAX...and that started with getting this distracting growth out of the way.
“Okay...here we go…”
Instead of pushing the sensation to the back of her mind, Isabelle leaned into her surging size, letting the feeling of pure expansion overtake her. Her limbs tingled, lengthening and thickening, paws making deep, sizable craters in the sand, legs sliding across the beach, footpaws dipping into the ocean. Panty threads snapped, her final button flew into the horizon, soft, heavy, hourglassy curves poured free of their bindings. She hugged one arm over her chest with a peaceful sigh, enjoying the plushness, enjoying the immensity...growing calmly was like taking off tight work clothes and sliding into smooth, silky pajamas. She laughed lightly and leaned back, partly to further relax, and partly because her armfuls of breastflesh were beginning to weigh on her. She allowed herself not to care as her head flattened trees, not to care that more toppled as she grew, not to care half her legs were underwater.
The dog girl continued to balloon, covering most of the beach with her wide, curvaceous hips, sand lost beneath a shore of yellow instead, tail fluffier than an entire thicket of trees. She daintily kicked out one leg, splashing water in a wave so big it would’ve capsized her boat. Her breasts swelled into hot air balloons of yellow, wobbling and blanketing her chest, forming two fat, full hills of mammary.
How big was she now? 50? 60? 70 feet tall? All she knew was that her gargantuan giantess form was covering nearly every inch of the tiny isle, practically overflowing. She let out a deep, tranquil sigh, utterly at peace.
“Sorry, Mr. Nook, but I’m cashing in all those sick and vacation days I never took…”
giantess animal crossing