updated 04/21/2014 AT 4:00 PM ET
•originally published 04/21/2014 AT 5:10 PM ET
“We would have sex once every two weeks,” McDermott, 47, says during an April 9 therapy session. “It wasn’t fantastic.”
As Spelling, 40, protests, their counselor calls him out.
“Dean, your expectations of what a marriage is supposed to be sexually, it’s like a fairy tale,” she says.
Married in 2006 after meeting on a movie set and leaving their respective spouses, Spelling and McDermott have four children together: Liam, 7, Stella, 5, Hattie, 2, and Finn, 20 months.
The actors have never shied away from cameras, sharing their love story on reality shows Tori & Dean: Inn Love and Tori & Dean: Home Sweet Hollywood. But Lifetime’s True Tori, premiering Tuesday, tells a very different tale of heartbreak and betrayal.
“I’m insatiable,” McDermott admits in the sneak peek. “Sex was an escape, just like drugs and alcohol.”
“But I don’t understand, like why her?” Spelling tearfully asks of his mistress.
“I wasn’t attracted to her,” he says. “It was just like a warm body.”