My stepmom wants me?

ok i have been an orphan for a while im 15 and my stepmom is liked by my dad alot but about 20 minutes ago she came into my room and i think she has been drinking and she said "is this what you want" and i was so confused then she started feeling me below the belt then she died some things that i will not mention and said if she wants me to do it again that i could just ask what do i do????