

It isn't your fault your giant step-sister is so hot. Her ass is huge and her farts are loud and disgusting. You've been jacking it to her forever. Most of the time you aren't caught.
Today is not one of those days.
She's on her knees, ass in your face, searching for something when she catches you. She's disgusted, and threatens to tell your step-mom. You beg her not to, finally admitting your humiliating fetish.
So.. she takes advantage of it. She makes you huff her farts, not letting you move away or escape the stink. You can tell she's enjoying it, dominating you and making you feel small and pathetic.
She thinks your gross, and loves the torment. You're going to get it through your head what a pathetic loser you are.
Just as you're about to cum, though, she hears your step-mom coming upstairs. She panics, and does the only thing she can think to do;
Crushes you beneath her fat ass, destroying your body with her gas.