Tori Spelling will leave Dean McDermott if she discovers he's cheated on her with other women.

The 41-year-old actress, whose latest reality TV series, True Tori, documented her efforts to rebuild her marriage after her husband cheated on her with Emily Goodhand in December, admitted she is "still afraid" to ask him if he's had multiple affairs, as she wouldn't be able to forgive him.

In a clip from the show's upcoming finale, True Tori: The Reunion: All Questions Answered, which airs on Lifetime tonight, the former Beverly Hills 90210 star revealed why she hasn't asked Dean if he has cheated on her with more than one woman: "I was afraid. I'm still afraid because I feel like there's no good answer." She added, "If he says that there weren't any other woman, I don't know if right now I can believe him and trust that's true. If he says there's others, I feel like that makes my decision for me, I have to leave and my heart wants to try to work this out. I feel like I've come so far, but that was my one way of protecting myself, was to not ask the obvious question."

Chopped Canada host Dean, who has four children, Liam, seven, Stella, five, Hattie, two, and Finn, 22 months, with Tori, previously claimed he wasn't attracted to Emily and only slept with her while he was working on the show because she was there: "Emily was there. ... I wasn't attracted to her. It was just like a warm body. I felt like I was on autopilot... It was an escape, just like drugs and alcohol."