How Tori Spelling Confronted Husband Dean McDermott for Cheating

April 17, 2014 — -- Tori Spelling is letting cameras into her home to film "True Tori" on Lifetime, a show documenting her husband Dean McDermott leaving home for sex rehab after an affair he had.

In preview clips, McDermott admits he cheated and "I was out of control. Sex was an escape, just like drugs and alcohol," while Spelling responds, "I can never give him enough sex, he's never going to be happy with just me."

Now, another clip was released (Wednesday on E! News) that shows Spelling telling her side and the moment she found out.

Watch: Dean McDermott Admits to Cheating in New Reality Show

"I got a call from my publicist and she said 'I just want to tell you something. It's a girl and she's claiming that she had an affair with Dean in Toronto when he was there. The girl has come forward, she's put her name to the story. She's giving all the details about her two-day affair with your husband in Toronto and it's going to come out next week, Christmas,'" Spelling admits.

The woman Spelling's publicist was talking about was Emily Goodhand.

Spelling, 40, admits her heart was pounding so fast, she could hardly speak.

"I asked Dean to speak outside, so I could talk to him in private. I wanted the truth," she adds. "I didn't want to make him defensive, I just wanted him to know I knew, see what he said."

The first episode of "True Tori" airs on April 22 on Lifetime.