Why would a mistress contact a spouse to tell about the cheating?

Question by Psychic Harry, Marriage Helper: Why would a mistress contact a spouse to tell about the cheating?
I see this in M&D once in awhile. Why would the mistress call the spouse? (Unless she were preggo or something criminal happened; but otherwise?) Makes no sense.

Best answer:

Answer by Kris
Maybe she feels guilty or she is trying to break up the marriage.

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