When Dean McDermott tries to excuse away his cheating behavior on the newest episode of their docu-series, Tori Spelling explodes in disgust, calling him a liar who just wants sympathy.

In the teaser clip obtained by Breaking Celebrity News, the struggling couple get into it during a therapy session on True Tori and Spelling isn't buying McDermott's "poor me" excuse.

"I went to Toronto with a ton of resentment," McDermott said of the trip in which he admittedly cheated with 28-year-old Emily Goodhand.