What is the ruling regarding a man's statement to his wife, "You and I are siblings," when he is angry, over the phone, and unaware of the rulings pertaining to this utterance?

If a husband says to his wife, "O my mother," without intending thihar (a pronouncement of divorce where the husband likens his wife to a forbidden close female relative), then nothing results from it. However, it is a detestable phrase from the speech of the foolish.