You've fancied your step-sister for a LONG time, something about how you can never have her drives you wild. So.. you steal some of her dirty panties, sniffing them and touching yourself, imagining how she feels, how she TASTES! Just the thought gives you the most mind blowing orgasm. One that unfortunately wont go unpunished, as later that day she find her cum soaked panties in your room and wants revenge.