My older stepsister stalks me and we fuck

This boy has been living for a year with his stepsister who is older than him. Their parents got married and took them to live together, and even though they are always at home they haven't noticed that the stepsister is constantly flirting with the young man. She is a rather sexy woman who is about to graduate from college and only likes to fuck young boys who get turned on quickly and whom she can teach new things in bed. One evening the parents go out for a walk and the woman notices that she has been left alone with her stepbrother, so she dresses up in her sexiest lingerie and surprises him in the bedroom. The boy gets nervous and becomes so aroused that he fucks his older stepsister.