Quote from Jerry in The Scofflaw
George: So why didn't you tell me? Jerry: He swore me to secrecy. George: So? Jerry: It's not like you're my wife. George: Well, I still think you should have told me. Jerry: Hey, believe me, you were better off not knowing. It's not easy to deal with someone in a situation like this. I was so nice to him I almost made myself sick.