Later when I tried to rent a room from my step son, and I asked for a massage he got a hard on

When I get in the house, I rent my stepson’s room and demanded for a massage. Laying my back on him, he began to massage it but his hand were so tricky moving nearby my behind which ended up having a feeling/body contact. We talked rather dirty and our intimate life involved raw and rather energetic sex leading to the climax.