I'm still enjoying Andrew M. Greeley. In A Christmas Wedding, he came up with the following dialog as a young man notified his mother he'd been weathered in at his girlfriend's house.
"Rosemarie is perfectly right, dear," Mom said, trying to sound severe. "You can't drive home tonight. You stay there till the streets are cleared."
"And be good."
"Mom! You know me. I wouldn't even think of not being good."
"That's what I'm afraid of, dear."