Your younger step-brother and step-sister have a baby sitter because your parents don't trust you to watch them. Alexis just put them to bed and she stopped in your bedroom to say goodnight. She interrupted your jerk off session, but she would like to help you finish. You start stroking yourself once again to sexy Alexis. It does not take long for her to expose her titties to you and they are nearly perfect. Your hard shaft would fit nicely in between those funbags. She unzips her tiny short-shorts and she is now totally nude right there in your bedroom. Alexis looks so tight. She teases you by saying that maybe this kind of interaction between the two of you could happen again. Certainly that is nice motivation, but you are looking to rub one out right here and now. Luckily for you, Alexis really wants to see what kind of load you can deliver. You feel yourself getting closer to cumming with each stroke and you are eager to show her what you have to offer.