You and your little sister have always had such a close relationship. You tell each other everything and stay up late swapping secrets. On this occasion she admits to you that she is curious about what it would be like to be a man and have a cock and what it would feel like to cum being a guy. Early the next morning your little sister awkens to find she has a dick by some mysterious means! She starts to freak out but you insist she should stroke her cock and you instruct her how. Your little sister really starts to get horny and starts to tease you, saying how much she wants to fuck your mouth and ass but begging you not to tell anyone how she feels. She shoots a hot load of cum for her big brother and is so happy you have both become even closer...