Suddenly, Tailsko's bracelet began to spark, pink energy shooting through her body. She grunted, taking a step back as her body shook. Her heart began to race, and her body started to feel warmer and warmer. Her face became flushed and she started to breathe heavily, her chest rising and falling. Her tails flicked around excitedly, her hair standing on end.
"Tailsko...?" Amy asked, concerned, "Are you okay?"
"I'm... I don't... Know..." Tailsko replied between heavy breaths. She gasped in surprise and discomfort as a sudden pressure overwhelmed her, causing her to stumble. She reached for the couch to brace herself, only for her whole body to rise in height, making her miss and fall into the back of the furniture. She braced herself, her back arching as her legs twitched. The pressure in her body intensified in her lower half, and with a sharp cracking sound her hips widened, stretching her shorts. Her pussy started to throb intensely, especially as her tightened shorts constricted around her crotch. Tailsko moaned, her tongue sagging out of her mouth.
With another crack that made Amy flinch, Tailsko's hips widened again, going outwards past her shoulders. Her legs twitched, tensing and relaxing as they became more shapely, and another shock rocked through her body, making her legs lengthen to the point where her crotch was positioned over the couch's backboard. Tailsko gasped again as her crotch was pressed into the board, her blush intensifying. She swallowed hard, and put her weight onto the backboard, grinding against it. Amy blushed at the sight, stepping back in surprise at the shameless display, but couldn't ignore how aroused it made her feel.
Tailsko's hips gyrated as she rubbed against the furniture, the friction enough to force the button on her shorts to pop open. And with each thrust, her thighs seemed to grow fatter, and her ass flared outwards more and more. With every bit of size gained, her shorts were pulled higher and higher up her legs, and lower and lower down her backside, her asscrack becoming visible and slight muffin-tops forming where the pants squeezed her waist. Tailsko's moans became louder and louder, raising in pitch as she stimulated herself more and more. The couch creaked and shook under her growing weight, making Amy feel a bit worried but also excited at the possibility of it breaking under the vixen. Until, with one last thrust, Tailsko cried out in rapture, her thighs as plump as Amy's torso, and her ass, now like two basketballs on her backside, jiggled where it leaked out from her tight shorts.
Tailsko fell forward, catching herself with her arms, her body slumping over the couch as she gasped for breath. This respite was short lived, though, as her breathing quickened as more and more pressure built in her chest. Her breath hitched and her back arched as her breasts jumped outwards, pulling up the bottom of her t-shirt as they reached the size of grapefruits. She squeezed her thighs together and began to lightly hump the backboard again, her tits bouncing with every thrust, and she drew her torso up, eyes crossing and face flushing as she rubbed it out again.
"Unh... Not enough..." Tailsko gasped, "Need more..."
"Tailsko...?" Amy asked, walking up towards the vixen. Once she got close, Tails' eyes suddenly snapped towards her, and Amy gasped to see how her eyes had changed, her irises now glowing pink hearts. Before Amy could do anything to help, however, Tailsko pounced onto her, the two tumbling to the ground. Amy gasped in shock and embarrassment as Tailsko climbed on top of her, her crotch rubbing against Amy's waist. The vixen stuffed a hand down her shorts and began to finger herself, looking down at the hedgehog with eyes full of lust. Her breath hitched again and she thrust into Amy with even greater strength as her breasts exploded outwards, reaching the size of cantaloupes. They slapped against her chest lightly, the sound and motion sending waves of arousal through Amy, who bit her lower lip and squeezed her thighs together, trying to restrain her growing desire.
Amy looked into Tailsko's eyes, seeing her lips plump and her eyelashes lengthen, while her hair started to grow down past her shoulders. Her waist thinned, and slight muscle formed over her stomach. Tailsko froze for a moment, body trembling even harder, her breath uneven and shaky. She let out short, sharp moans and thrust her hand harder up her pussy. Her thick thighs clenched around Amy, and her nipples hardened and poked through her top. And finally, in one last powerful thrust, Tailsko let out a loud and sensual moan, her eyes nearly rolling into her head. She came hard, and her breasts swelled one last time, stretching her t-shirt into a crop-top as her breasts grew to the size of watermelons, her hair grew down her back, her nails lengthened, and her tails grew larger and fluffier.
At that, she collapsed on top of Amy, hand still in her shorts, gasping for breath. As she slowly stabilized...
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