Grady Loveland finds himself in quite a jam when his wife and his mistress give birth to his daughters within minutes of each other. Everyone is amazed that the babies seem identical. Grady gets the babies mixed up while trying to figure how he is going to keep the secret from his wife. Luckily, his mistress had a feeling about which child was hers. "Trust me. A mother knows," she had explained. Her maternal instincts had been correct. Grady must decide if he will keep his vows to his wife or leave her for his mistress.