A fight erupts between families over the text of Liz's and Bobby's wedding invitation -- specifically, whether or not to mention Philip's and Simon's sexuality. Meanwhile, Bobby's priest, Father Joseph, tries to talk Liz out of the marriage.
Thinking that they're a little fragile for the wilderness, Mace is less than welcoming to Philip and Simon when they all attend Bobby's camping bachelor party. But a sexy park ranger helps Philip and Simon even the score.
When Audrey expresses concern that Liz and Bobby are "living in sin," both families weigh in on making immediate wedding plans, but the accelerated pace could be too fast for Bobby. Meanwhile, when Philip learns that Mace is related to a famous playwright, he begs Mace to help him gain entry to an elitist, social club on.
Mace's longtime friend, Dan, visits for a planned fishing trip, but before the fishing fun can begin, the two men have old scores to settle. Meanwhile, Maddy has eyes for Simon's new teaching assistant but fears that he may be out of her league. Simon concocts a plan to make the seemingly unlikely love connection.
When Simon asks Audrey to make costumes for a small musical theater production benefiting gun control, Mace is furious to find out that she is involved with the show at all. But when both of the leads have to be replaced at the last minute, Audrey and Philip can only hope for the support of their own leading men.
Philip hires Mace to pose as a typical American couch potato. But when he grows tired of eating chips and watching sitcoms while on display, it's left to a famous television personality to take his place (Ed McMahon). Meanwhile, Audrey and Simon become best buddies while working together to create a recipe for the perfect sauce.
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.
Bobby and Liz's families are trying their best to blend their very different styles of celebrating Christmas when a Christmas Eve delivery to Philip and Simon's house injures "Santa" Mace. And Bobby feels pressure to compete with the lavish Christmas gifts that Philip and Simon have planned for Liz.
Bobby's a bartender and the only son of gregarious, salt-of-the-earth Irish Catholic parents from Boston. His fiancée, Liz, is a toney Harvard student and she's Protestant (no, that's not the problem). Liz has two dads, not one, and they're a worldly pair of well-heeled gay men.