You decide to hit the green button again, and sure enough, the girls butt begins to grow again. Her already tight pants ready to burst open.

The girl looks down at her rear, watching it grow, she doesnt seem shocked by it, though she gives it a rub, probably sore from the tight confinements of her pants.

Then, with a loud rip, her pants split down the sides, she stands up from the chair and there rear of her pants split down the middle, revealing a whit lacey thong.

Her butt is very large now, each cheek the size of a large fully inflated beachball, her hips had flared outwards along with the growth of her plump buttocks. She starts looking a little worried now, her butt still hasnt stopped growing..

You then..