Old girlfriend and teen stepson engage in a sensual massage at home

After a long day at work, the young guy decides to invite his girlfriend over to his place. His mother, who has been out shopping, is not home yet. The girl agrees and comes over. The guy suggests to her that they have a nice massage. The girl agrees and starts massaging his back. The massage turns into something more as the girl's hands wander down to the guy's buttocks. She starts to touch him in a more intimate way, and he doesn't object. They both are enjoying the massage until the mother-in-law walks in on them. She is surprised, but she doesn't say anything and just goes to the bathroom. The girl continues the massage, and it gets even more sensual. The guy is fully aroused now, and the girl takes off her clothes and straddles him.