Maggie's 16th birthday is approaching and Fran intervenes in her father's plans for her party. Instead of a boring party at the Guggenheim Museum, Fran convinces Mr. Sheffield to have it at her aunt Frieda's bar. While the place is not nearly as fancy as the museum, Fran has to solve a very important family feud before the party can happen: her mother and Frieda haven't spoken to each other since 1979. The two make peace, but when Frieda comes out of the bathroom, her butt is showing and she blames Sylvia for the same embarrassment when they first fought. They start a food fight which quickly spreads to the whole party in a huge food war. When Mr. Sheffield walks in, he is shocked to see that scene and just when he's about to twist nanny Fine's neck Maggie thanks him for the best party ever.

Fran's aunt Freida has gone broke and moves into the Sheffield residence. The only way Fran can turn this around is if she convinces Freida's rich boyfriend Fred to propose to her. Fred doesn't think of himself as an exciting man, so Fran decides to teach him dance lessons. He has a heart attack and falls on Fran, just as Freida walks in. After the situation is cleared, everything seems to be fine again until Fred tells Fran he's in love with her. She almost puts a stop to the wedding, if Mr. Sheffield hadn't interfered. Fred has another heart attack, but this time everything ends up just fine.

Fran and C.C. agree to let Dr. Joyce Brothers decide who's the better woman for Maxwell; Niles quits after he's denied a raise, a demand based on his faulty impression of Fran's salary.

Aunt Freida decides to get back at Sylvia for not letting her sing at the wedding and buys her condo, leaving her with no place to go. Sylvia and Morty move in to the Sheffield mansion. At first, Fran is worried about how Maxwell is going to take it, and happy about having her mom around like old times. But Maxwell surprisingly takes it well as Sylvia spoils him like the mother he never had. Fran, on the other hand, starts remembering all the annoying things about living with her mom, and decides she must convince Freida to give her mother's condo back. They make some alterations on the wedding video to make it look like Freida sang on it, and the two sisters-in-law make up. Meanwhile, Niles experiments being a model for a day.