Sharing a Bed with my step-Brother

My room is being remodeled so I have to bunk with my step-brother. Unfortunately, it's so hot in the house that I have to wear really skimpy pj's. step-brother is a little weirded out, but I tell him it'll be ok. The next morning I notice my step-brother's pants are gone and his cock is rock hard! Trying to be helpful, I wrap my lips around his thick member and start sucking.