Tori Spelling is getting some marital advice from a very unlikely source.
As the mother-of-four continues to figure out what's next in regards to her relationship with Dean McDermott, a sneak preview of True Tori's new season shows a reunion we didn't see coming.
Tori decides to meet up with Mary Jo Eustace, who ultimately separated from McDermott after discovering he was cheating on her with Spelling.
"When you start a relationship with someone, you don't know the other person they're involved with," Tori begins to explain to Mary Jo. "You have one story that's painted for you and you made a pretty accurate portrait of him. It all became true in my own relationship. You can say I told you so."
But while many of Mary Jo's friends immediately assumed she would be excited about the news, the feelings turned out to be the complete opposite.
"It's actually really horrible. It's not a great feeling," Mary Jo tells Tori. "They have four children. What does it mean at the end of the day? It doesn't make me feel any better."
To help bring clarity to the situation, Mary Jo hands Tori a romantic letter Dean had written to her before the cheating rumors began. Clearly shocked, Tori finds it hard to believe a man could betray his wife so quickly.
"It's just hard to think you can tell someone this one day and then months later, it just changes so drastically," Tori says.
In another surprise admission, Mary Jo believes Dean would have cheated on her even if Tori had said no to the new relationship.
"It would have been somebody else," Mary Jo explains. "I think he was really determined."
True Tori will continue to follow Tori in near real-time as she searches for honesty and happiness with Dean. The married couple is still struggling after he was caught cheating last year.
Although Mary Jo applauds Tori's "kick-ass" personality, she makes it clear that Dean is a pretty tough guy.
"I don't hate Dean," she admits in the clip. "I mean he's a total knob--I know that, but he's your knob now."
Watch all the family drama unfold when True Tori premieres Oct. 21 on Lifetime.