The ex-wife of actor Dean McDemott confronted the star’s mistress-turned-wife Tori Spelling after learning that the pair were having an affair, pleading with the actress not to destroy her marriage.

Tori – who was married to Charlie Shanian at the time -fell for the also married Dean while filming the Lifetime made-for-TV movie Mind Over Murder in 2005.

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McDermott and Spelling split with their respective spouses in 2006 and wed just weeks later. Now the stars of Oxygen’s Tori & Dean have their own family – they are parents to two-year-old son Liam and 11-month-old daughter Stella.

Dean and his then-wife, actress Mary Jo Eustace, had just adopted a baby girl and the news that her husband was doing Spelling came as a shock to Mary Jo, who begged Tori to leave her husband alone.

In her new book Divorce Sucks, Mary Jo writes: “I told her I thought (her) behaviour thus far had been the height of insensitivity and rudeness. I tried to explain that we were a real family, with a new baby and a substantial history, and there were serious consequences to all of this.”

She continues: “The toughest moment was when my husband kept calling her to see how the meeting was going. She told him it was ‘going great’ and joked that we were quickly becoming ‘soul mates.’ I left the room on that one.”