Stepfather brings teen and girlfriend to bar, then has sex with attractive young woman

The young man brings his girlfriend to the bar with his stepfather, who is surprised by their young waitress. The attractive girl catches his eye and he invites her to his house. When he gets home, he seduces her, but she keeps her distance. He takes off his pants and she sees his impressive size. She decides to give in to his advances and they start making love on the couch. Meanwhile, the young couple returns home and finds them in the act. The girl is shocked to see her boyfriend's stepfather with another woman, but the father-in-law continues to pleasure her. The young man watches as his girlfriend joins in, and they all indulge in a passionate encounter.