A man takes his seat in the theater, but he is too

A man takes his seat in the theater, but he is too far from the screen. He whispers to the usher, "This is a mystery, and I have to watch a mystery close up. Get me a better seat, and I'll give you a handsome tip."

The usher moves him into the second row, and the man rewards him with a quarter. The usher looks at his tip for a second and then leans over to whisper to the man, "The wife did it."