Fran and Niles fight over who gets to ask Mr. Sheffield for the weekend off. Fran wins, and Niles accuses her of seducing Mr. Sheffield to get what she wants. He decides to get back at her and allies with C.C. against Fran. Finally, Niles and Fran forgive each other, and he suggests Fran takes Mr. Sheffield with her to the Fine Family Reunion at the Niagara Falls, the perfect place for him to propose and a solution that will give them both the weekend off. Unfortunately, Fran doesn't listen Mr. Sheffield's proposal. He slips and falls, with no recollection of what happened.

Fran moves to her mom's because she doesn't want Maxwell to see her 24 hours before the wedding. Maxwell's sister arrives for the wedding and says their mother is not coming because she doesn't like Fran, which concerns Maxwell, but after awhile he gets over it, after realizing that it's not important. Fran goes to Jersey to pick up her sexy white negligee that she had ordered specially for their wedding night. On their way back, Val's car breaks down in the middle of nowhere, and Sylvia, Val and Fran have to spend the whole day waiting for someone to rescue them. Maxwell is visited by a very special someone: Sara, his late wife, who comes to wish him a happy marriage and confess that she sent Fran into their lives. Val's mother call Maxwell and goes to rescue them.

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.