In the teaser clip obtained by RadarOnline.com, the struggling couple get into it during a therapy session on True Tori and Spelling isn't buying McDermott's "poor me" excuse.
"Usually when I go away, we're intimate before I leave. And we weren't. And we hadn't been for a bit leading up to that and that really hurt me and I was feeling like, you're not gonna be intimate with me then I'll find someone who wants me. I was 250 pounds and I felt like sh*t. I looked like sh*t and I just, I needed some validation…"
But McDermott's insecurities weren't getting anywhere with Spelling.
"Stop!" she interrupted.
"I don't know who's story you're telling, but it's not ours. You are NOT telling our story. You are lying. I don't know what you're doing right now, but it makes me f**king want to punch you right now. How dare you say that? And you know that! You are making this up to make yourself look better right now and it's pissing me off!"
"We weren't intimate the night before I left," he defends.
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"The night before I always go away, we're intimate. And we weren't that night…"
"Now you're bringing it back to the very night before you left? " Spelling says.
"We didn't have sex, so that is why you went and f**ked some woman?! Two weekends in a row we did things that I had never done before because you wanted it, you kept wanting to raise the bar.."
McDermott can't take the focus on his sex life, or his wife calling him out.
"Nope, I can't do it," he says. "I don't want to talk about my f**king sex life!"
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After a three-month stint in rehab, the couple decided to document McDermott's release and his attempt to save his family life with Spelling in a six-episode reality TV show on the Lifetime Network.
The show was met with criticism early on though, with speculation that the fame-seeking couple had in fact set up the entire cheating scandal just to keep themselves relevant and land a TV series to help with their financial troubles.
True Tori airs Tuesday night's on Lifetime at 10 p.m. PT/ET.