Stepsis makes you wear her panties SPH

Your stepsis barges in your room because its been another crap day at work. But when she's complaining, she notices something - panties under your pillow. More specifically, HER panties. You're a pervert, a complete pervert. What do you do with them? She laughs at you as she gets you to put them on and show here. She laughs even more when you take off your trousers and reveal the micro dick underneath. She has to film it, this is too good! Step brothers are supposed to be hung but you... you're a disappointment.