Michael's sister Kelly is coming over for the weekend, which freaks Jay out because every time Kelly comes over she overstays her welcome and always gets on Jay's nerves. This time is no different, with Kelly constantly throwing on Jay's face that she is fatter than her, a worse cook than her and even tries to make her look like a bad singer, even though Jay can sing wonderfully. Things heat up when Kelly brings up Sharon, Michael's old girlfriend and Kelly's best friend. The two women get into an argument and it's up to Michael to break them up. He pulls it, and Kelly and Jay finally get along. But for how long?