Leslie and Jon have been roommates for years, and Jon has been filing their taxes as if Leslie is his wife. He is not Jon's wife, but when the IRS comes a-calling, Leslie has no choice but to dress the part. Adding to the mayhem, the landlord won't allow men and women to live together who aren't married, and Jon's mother shows up unexpectedly to help plan the wedding between Jon and his real fiancé, Kate.
