Wearing jeans, I rub my ass all over this yellow balloon, doing small hip circles and tiny thrusts...every time I move my hips backward, I feel a little teasing pressure on my clit. I support my weight on the chair at first, but I gradually put more and more of my weight on the balloon. I keep expecting it to POP at any second, but before long I'm completely sitting on the balloon, even bouncing up and down. It won't pop! So I bounce a little more, until all of a sudden...