Jealousy.

Despite trying to cure himself with a hypnosis tape John Pettigrew is insanely jealous of his wife Jane Margory and convinced she is having an affair with her handsome water aerobics instructor. Seeing a name and number in her diary he follows her in drag, only to find it is a transvestite club she is covering as a journalist and where he is embarrassingly chatted up. In the event his suspicions are correct but the proof comes at a cost.