From the movie She-Devil -
Directed by Susan Seidelman and starring Ed Begley Jr., Bryan Larkin, A Martinez, Jack Gilpin, Robin Leach. Ruth is a frumpy, overweight housewife and mother, who desperately tries to please her accountant husband Bob. After Bob meets romance novelist Mary Fisher at a dinner party, they begin having an affair. Unable to remain in a state of denial, Ruth vows to get revenge.