I have a shy and timid stepsister. Perhaps because she's family, she feels safe around the house, wearing only pajamas and no bra, which is a sexy outfit. Honestly, I feel like I'm a woman when I see her like that. So I finally reached my limit and touched her... I thought, "Oh no! I'll get in trouble!" But surprisingly, she started to fidget! Thinking, "Could this be it?", I started stimulating her nipples every day around the house, and she became more and more aroused! If this happened, I'd be able to go all the way! No, I could! Thinking this, I started stimulating more than just her nipples! Then, her whole body began to writhe, drooling, and her pussy was soaking wet! I didn't have to worry about my parents finding out, so I shoved my dick in! Since that day, my stepsister has been my sex friend.