Cherie says she believed her husband, Terry, to be a good husband and father until she learned a secret he had been keeping: he has been unfaithful to her throughout their 11-year relationship. Cherie says not only did she find out that he had been cheating, but that he may have fathered a child with a woman he had an on-and-off affair with for 15 years.

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In the video above, Cherie meets her husband’s former mistress, Crystal, for the first time and sparks fly between all three, leading Dr. Phil to interrupt the arguing. This episode airs Friday. Check here to see where you can watch.

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