You're hanging out in sis's room watching her stretch. She looks so hot in her short jean shorts, she doesn't even notice you watching her and when she does, she calls you out. Of course you're hard and she sees it! *** You can't believe she even said anything, but soon she's looking at your dick shocked at how big it is. "OMG what am I doing? You're my step-Brother!!... Okay, you better not tell anyone!" She sucks your dick, sits on your face, rides you then turns around and rides you, then begs for your cum in her mouth after telling you you better not cum inside of her. You lie there watching your hot step-Sister in her jean shorts pleasing you. The best step-Sister ever!