My son's wife seems to be unsatisfied with her sex life with my son and casually shows me a panty shot, inviting me. My dick stands up despite my age when she sees it, and she looks even more frustrated. I rubbed my dick against her ass while my son and wife weren't looking, and that lit the fire. It's precisely because we're in a relationship where we shouldn't be touching each other that the two of us can't control our arousal.
