Now, Izzie doesn't have an inflation kink but she always felt like the puberty fairy didn't give her a lot to start with. While she is quite happy with the handful of her breasts, what Izzie really wanted was a proper bubble butt. She did try to work out and eat more to fill out her posterior, but she got too busy with school to work out, and her father wanted everyone in the family to eat healthier with smaller, greener food.
But now that she has the power to fix that, Izzie rushes down the stairs with the inflation ball at hand. She hopped off the last rung of the steps and entered her bedroom. Once Izzie locked up her door and closed the drapes by the window, she cast her attention on her closet mirror. Making sure that her skirt-covered butt is front and center for the show, Izzie squeezes the ball in her hand with her mind focusing on her rump.
From that first squeeze, Izzie could feel some air or gas beginning to fill up her bum. The loose fabric begins to lose its wrinkles and starts to show Izzie's panties. Izzie squeezed again and more of the mysterious element filled her booty, with the only tight feeling that the young girl could feel was her button skirt. One more squeeze and Izzie's skirt button pops off, relieving the girl of her tight clothes and revealing her bubbling butt. Not feeling like it was enough, Izzie squeezed again which shifted her once-normal panties into a shrunken thong against her swelling backside.
Izzie rubbed her twice-as-wide butt, it still feel like her own flesh and skin but more. She put down the inflation ball since she was happy with her current size and tried to fly like the items in the attic. But given how much bigger she is in comparison to those inanimate items, all Izzie did was jump a little higher and crash back into the ground. It was quite fortunate that Izzie broke her fall with her inflated padding. However, she also landed on the ball pump, which not only did Izzie squeeze again while she was thinking about her butt, but also got stuck in her plumping caboose.
The extra growth has sent her glutes into the plush size category, a size that looks ridiculous on Izzie's young frame. Unfortunately for Izzie, she didn't feel the cursed object that was stuck in between her tush. And with every movement Izzie makes with her butt, the more the pump is getting squeezed and inflated. As Izzie struggles to get up from the floor while she is still thinking about her butt, the pump's magic inflates Izzie's ass which makes her more of a butt than a girl.
By the time Izzie is perpendicular to the plush carpet below, her simple bubble butt has become a spherical buttock. Their perky mass has reached up to below her shoulder blades and reached down to her knees. While her hips were slow to keep up, Izzie's butt has made her wide enough for her to need three chairs to sit down. If she wants to sit in chairs that is.