Chris and Meg switch roles with Peter and Lois for a week after the kids complain about the punishment the grown-ups mete out after they crash Peter’s dirt bike, which they took without permission.
After Peter catches Lois’ dad, Carter, having an affair, he is strong-armed into keeping a secret. But when Peter accidentally spills the beans, Lois’ mom demands a divorce, and Peter is in charge of Carter’s return to bachelorhood.