Nancy is in bed with her lover, Bill, who also happens to be her husband's best friend. They make love for hours, and afterwards, while they're just laying there, the phone rings. Since it is Nancy's house, she picks up the receiver. Bill looks over at her and listens, only hearing her side of a quite cheery conversation...
"Hello?" says Nancy. "Oh, hi. I'm so glad that you called. Really? That's wonderful. I am so happy for you. That sounds terrific. Great! Thanks. Okay. Bye, bye."
As she hangs up the telephone, Bill asks, "Who was that?"
"Oh," Nancy smiles, "that was just my husband telling me all about the wonderful time he's having on his fishing trip with you."