Jen felt herself bend at the waist, sticking out her ass as it began shaking. "Already? Damn that was fast." Jen quickly shed her skirt and panties, as they would become impossible to remove besides for cutting them if she left them on. Her ass was already growing rounder, swelling by the second. Each cheek becoming smoother, rounded, and definitely much more bouncier.
"Hehe... my ass is gonna be hehehehaha... so massive." In just a minutes time, Jend ass was several times larger, with each cheek already the size of beach balls. Jen also was giggling up a fit as she couldn't help but squeeze and squish her bouncy butt against anything she could find, enjoying being pushed off of whatever she ran it into. After 3 minutes, Jen started feeling her ass press against her thighs to the point it was forcing her to bend at the knees. Suddenly, like when 1 soap bubble absorbs another, Jen's thighs were sucked in, as the skin of her ass cheeks enveloped them fully, causing her to fall backward onto her ass. Her lower legs were now being sucked in, until they too were gone as well.
Looking at her giggling self in the mirror, Jen saw her new body. Everything below her waist was just pure asscheeks stretching 180 degrees around with a full split down the center, separating the two of them. Her pussy now pointed upwards, as it was repositioned to accommodate her magnificently huge ass. Her tits also had swollen to an unimaginable size that should be impossible for her thin and fit torso to grow, yet she had no trouble carrying them proudly. The way she now sat on her ass caused her back to naturally arch backwards, lifting her boobs up and making them appear to be much more prominent too.
As if she had been doing it for years, Jen bent forward and quickly bent backwards, flinging her boobs upwards and causing herself to lift off of the ground a few inches before falling back down a few inches forwards where she bounced a few more, much smaller and shorter times before stopping. She then began to bob up and down before she once again lifted up off of the ground and was able to move again. She didn't even need to worry about falling over, as her center of mass was so low now that no matter what, she never would fall any other way than ass first. Kind of like one of those wobble toy she had as a kid.
Hearing the noise, Jen's mother entered her room. "Oh, well. That's how it is then. I will clean out and donate all of your panties, pants, leggings, shorts, socks and shoes while you are at school today, honey. Afterwards we can go shopping for one of those egg-cup shaped beds and a new chair for you. I will also have to see if your father can get off of work to move your room down stairs, as you certainly can't climb up them anymore with that fat of an ass. Oh, and do you prefer adhesive or apron style panties? You may be a bouncerbutt but that does not permit you to always go around with your pussy on full display. Today is fine, as you just turned, and most don't hold it against you every once in a while, but not every day ok" said her mother. "Adhesive please Hahaha!" Laughed Jen. Now that she was a bouncerbutt, many things were going to change. For one, every night whe. She went to bed, she would need to slide a tube into her asshole to relive herself, as she couldn't exactly go normally anymore. This was very nornal for bouncerbutts to do. So nor.al that they made an egg-cup shaped bed with a tub specifically for this purpose that could be hooked directly into the plumbing line for the house or building. There was another, smaller tube for her pee, as with an upwards facing pussy, using a toilet was near impossible to do now. Even urinals wouldn't help much because most of it would just run down the front side of her asscheeks and into her crack. Jen was able to bounce out of her room with the help of her mother pushing her through the doorway, again to help get her down the stairwell, and finally once more to get her out of the house. The door frames would be renovated soon too as a specialized group was always on call for rush adjustments needing to be made to buildings for new bouncerbutts using them.