The cuckolded husband's world is upended once again as his father-in-law, a lecherous old man, visits for "Grandpa's Visit - Part 4." The old timer, with a gleam in his eye, sets his sights on the husband's friend, a ripe, young woman. As the husband remains clueless, the pair sneaks off to the bedroom, the old man's gnarled hands exploring the young woman's curves. She gasps, her pussy throbbing as he teases her, his massive cock tenting his pants. The husband, finally clueing in, tiptoes towards the bedroom, only to catch them in a heated, taboo lovers' clinch.