I think lots of dudes fantasize about fucking their girlfriends step-mom. Especially when they look fucking sexy. Seemed like dude was feeling the step-mom more than his lady. Undressing her with his eyes. She knew exactly what he was wanted, so the step-mom joined them on the couch for some fun. Maybe the daughter isn't pleasing her man right. Let the Milf take over and show these rookies how it's really done.