My step bro comes into my room barely dressed saying he's going out with his friends. I look for something in my room and turn back round to see he has a hard on for me! I am SHOCKED. I tell him to put it away and he does. Then he asks me to get undressed and it can be our little secret. I do as he says as it sounds fun, we both get undressed and turned on by the idea that mum and dad are downstairs. We try and be quiet as I ask him to put his cock inside me and cum inside me.