So I couldn't sleep, and my step brother was still awake so I went over to his bed. I noticed when he looked at me that his dick started growing. I could tell through his boxers that his dick was HUGE. I tried to resist putting it in my mouth so I went to the bath to masturbate. He heard me cumming so he came in to tell me to be quiet but it was too late. He stuffed his huge cock in my tight wet little mouth and we ended up fucking in the bath tub!