Dean McDermott Admits to Cheating in New Reality Show

Tori Spelling and her husband let cameras into their therapy sessions on their newest show.
2:26 | 04/16/14

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Transcript for Dean McDermott Admits to Cheating in New Reality Show
have always been very open about their relationship, putting it on display for the world to see on their reality shows. But now, they are taking it to a whole, new level. Sharing intimate details for the cameras as they try to repair their troubled marriage. ABC's Abbie Boudreau has the story. I cheated on my wife. I'm really mad. I was out of control. Reporter: Tori spelling and her husband get shockingly raw and honest. Sex was an execute, just like drugs and alcohol. Reporter: Her lifetime 'true tori" is more open than ever before. Spending most of her life in front of the camera. This time, spelling lets cameras into her most private world, therapy sessions with her husband, dean Mcdermott. I wanted people to get me. To see the real me. Reporter: The rumors of his cheating, now confirmed by Mcdermott himself. And just out of rehab, he joins his wife on camera, as they try to repair their marriage. Tori talks openly about how she first learned of the affair. I got a call from my publicist. 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 in the story. She's giving all of the details. And it's going to come out next week. Reporter: So, why make it all so public? Spelling told "Us" magazine, in an exclusive interview, it's not a decision I came to easily. I wanted to tell my story exactly as it was happening. What my feelings were. The mother of four talks about the stress of juggling family and dodging constant paparazzi. My kid's sick. Please don't take pictures of this. What are your thoughts about me coming home? I don't think I'm comfortable with that yet. Reporter: But putting something so intimate on TV, can the lines of what's real get blurred? I think having the cameras around could cause them to sweep a lot of true issues under the rug. This show is like putting a band-aid on a wrong that needs to be healed before it's exposed to the public. I'm well aware this might not have a happy ending. Reporter: For "Good morning America," Abbie Boudreau, ABC news, Los Angeles. "True tori" premieres on lifetime.

This transcript has been automatically generated and may not be 100% accurate.

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