I want to be a good step-Sister and please you. I want to watch you stroke and jerk off for me. You start stroking while I tease you and undress. It looks like so much fun stroking your big cock, I want to do it. You let me grab it and jerk it off for you. I can't help it but need to suck your cock. I begin licking and sucking your dick like a good step-Sister. After sucking I want to fuck, I need to feel your big step-Brother cock inside me. We fuck in different positions, forwards, from behind...but nothing makes you cum. You are just going to have to stroke it to my instructions while I watch. You stroke to me and my voice, giving you a countdown from 10 to get all your cum out of those balls.