Joey and the Fancy Sister

Joey and Gina's sister Mary Theresa is coming for a visit, and Gina can't stand her because she thinks the world revolves around her. When Mary Theresa discovers that her engagement ring is fake, she decides to call off the wedding and stay in California, leaving Joey and Gina to try to find a way to get her to return to New York. Meanwhile, Michael is oblivious of a girl's interest in him.