My twin stepsister is the worst! She's always bossing me around and teasing me about being a nerd. She walks in on me bent over with my panties sticking out of my pants and laughs at me and makes me give myself wedgies. She sneaks a few embarrassing photos of my ass in an atomic wedgie and threatens to show everyone at school what a loser I am unless I agree to do her homework. She's such a bully!