When Steve finds out he has scoliosis and has to wear a back brace, he becomes the laughingstock of the school, but feels better when Stan admits to wearing a toupee since he was Steve's age. Meanwhile, Roger takes Francine to a weeklong spa retreat for two, but they run into problems when they try to sneak in an unpaid guest.

When the Smiths try to plan a family game night, Roger is full of excuses about prior commitments. However, when he is caught in a lie, the Smiths feel stabbed in the back when they realize Roger has been cheating on them with other families. Stan, Francine, Hayley and Steve go on the offensive to teach Roger a lesson about monogamy until Roger has a breakthrough about why he isn't a one family kind-of-guy.