Sydney already had a bubble butt but not a big one. That was gonna change as her butt starts to plump up as she's reading Her butt and hips were plumping as she was reading but she did notice her jeans getting tighter. She turns around to see her butt plumping up. She stares in shock as her butt starts to break out of her hopeless jeans.
RRRRRRRIIIIIIIPPPPP
Her massive butt rips out of her jeans and starts to strain her hopeless panties. She gets up out of her bed with a little jiggle from her bubble butt. She scared (and a little excited) about her butt gaining so much mass. She wants to find a hiding place if anyone finds her in this state. She starts to try to go under her bed but her butt is too big to fit.
'How big is my butt gonna get!?' She gets out of under her bed and goes in her closet to hide. It's not the best hiding place but it will be good enough. She looks at her butt again and it still is getting bigger with her panties at the verge of snapping and showing her bare butt to the world. She starts having dirty thoughts about her crushing people with her butt and how-
SHHHRRRRIIPPP
Sydney gets her train of thought back into shape as her panties RIP and her butt has nothing left on. Sydney wonders how big her butt and sits on a chair in the closet. Her butt is on the edges of both side of the chair. The chair is creaking on her butt mass so Sydney gets off before the chair breaks. She does see that her butt has stopped growing and starts to think of what to do next.