Wife says to husband in the morning:
"You were talking in your sleep last night"
Husband: ..."Oh yeah"
Wife: "Yes, and who is Milly!?"
Husband, quick thinking: "It's the name of a horse I bet on"
Husband thinks he's got away with it until a few days later he walked in to be met by his wife who is clearly furious....
Husband: "What's the matter dear?"
Wife: "The horse rang!"