Avery prepares to head home and visit her family for the holidays. Liz suggests Jack and his mother Colleen accompany her. When Jack hints that Colleen isn't aware of Avery's pregnancy, and both Liz and Avery throw a fit. Jack also hints that he hasn't told Colleen about finding his real father Milton either.
When Colleen arrives in town, Jack decides it's time to tell her about Avery's pregnancy. Colleen chastises Jack for having a child out of wedlock with a Protestant. Jack reminds Colleen that her reaction is exactly why he waited seven months to tell her. This sends Colleen into even more of a tizzy. Jack seeks revenge by secretly inviting Milton over for Christmas dinner.
Liz is angry that Jack is creating drama at Christmas dinner when she specifically asked him not to. Milton arrives for Christmas dinner and finds out that Jack's going to be a father and that Colleen's coming to dinner. A very pregnant Avery surprisingly shows up to Jack's dinner too, and she isn't happy. Jack's plan to have Liz, Avery, and Milton ambush Colleen at dinner is coming together.
When Liz tries to stop the ambush, Jack sends her on a wild goose chase, looking for Colleen. Meanwhile, Colleen shows up at the dinner table and is shocked to see Avery and Milton. She's at a loss for words. Jack takes this as the best Christmas present of all.
Tracy takes his new role as a real actor very seriously. On Christmas Eve he decides to preview his movie, "Hard to Watch" at a battered women shelter. Then Tracy has a change of heart and remembers what Kenneth told him, that laughter is the best medicine. He previews his comedy, "Chunks Part Two," instead.
Jenna is depressed over her breakup with Paul and not having a date to the biggest event of the year, New Queers' Eve. Paul shows up at her door and says even though they're no longer together, he had a great idea for their couple's costume for the party. They both have the same idea for costumes and feel like it's fate.
After Colleen is rushed to the hospital, Jack, Liz, Milton and Colleen make peace. This inspires Liz to change her mind and take a train to Pennsylvania to see her family for the holidays, drama and all. Both Milton and Colleen chastise Jack for trying to ambush his own mother for Christmas. Jack smiles, because he feels like he has a real family now.