A woman is in bed with her lover who also happens to be her
husband's best friend. They "entertain themselves" for hours, and
afterwards, while they're just laying there, the phone rings.

Since it's her house, she picks up the receiver. Her lover watches
her and listens intently, only hearing her side of the
conversation.

Speaking in a cheery voice, she says, "Hello? 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."

She hangs up the telephone and her lover asks, "Who was that?"
"Oh," she replies, "that was my husband. He was telling me all
about the wonderful time he's having on his fishing trip with
you."