I was alone, in my underwear, on the couch watching porn on my phone when my step-father noticed. The excitement of watching it must have been too much for me as he noticed my nipples standing erect and my eyes focusing intensely. He offered to put away my phone and to replace it with his hard cock. Without hesitation I agreed, taking his briefs off and giving him a blowjob. We waited until my mom was out of the house before he entered me, fucking me until he was satisfied.