A cop and his sexually frustrated wife are struggling to keep their failing marriage intact, when by chance she finds that he is at heart a voyeuristic peeping tom. To satisfy him and herself, his wife has numerous affairs, which her husband watches on closed-circuit televison. However, the pair soon learn that when you play with fire, you'll always get burned.
Starting at 27:30, the wife entertains, seduces and fucks the cable guy. Her husband, who is a cop, comes home and catches them in the act. The cable guy runs away while the wife, very terrified, apologizes profusely to her husband. But instead of getting mad, her husband starts making love to her. Very hot scene. One of my early favorites.