Bobby and Liz break the news of their secret engagement to their families and each gets a less than warm response. In fact, Bobby's conversation with his folks ends with him moving into Liz's parents' guest house. Naturally, this doesn't thrill Philip and Simon, but at the risk of losing Liz completely, they agree to the situation temporarily until Bobby can work things out with his parents.

Thanksgiving turns into a fiasco when Liz invites Mace's overbearing mother, Colleen, to the dinner. A web of deception begins when Mace tells the very conservative Colleen that Philip and Simon are Liz's uncles – instead of her dads. As luck would have it, Colleen is so charmed by Philip and Simon that she wants to introduce them up to her unmarried daughter. Meanwhile Philip spins a tale of his own when he tells his stuffy decorator that Liz's future in-laws are wealthy. But it all goes awry when the designer pays a surprise visit during dinner to meet Liz's future in-laws.

Bobby is furious to learn that Liz has discussed their sex life with her dads. While Mace and Philip are pleased that the relationship could be in trouble, Simon and Audrey conspire to keep the couple together.