Because of my father's remarriage, I suddenly got a stepsister. She is incredibly careless at home and always shows off her panties! Her boobs are fully visible too, making me horny all the time! No matter what, I can't see her as a sister but only as a woman. So, I decided to risk destroying my family and attacked my sleeping stepsister... To my surprise, she's a super masochist! When I forcefully choked her or slapped her, she became completely submissive. We then did all sorts of dirty things!
