Brandi Glanville and LeAnn Rimes' ex recall the moment they knew their marriages were over

Here's something you don't exactly want to have in common with someone.

Dean Sheremet and Brandi Glanville commiserated with one another over how their marriages fell apart shortly after their ex-spouses, LeAnn Rimes and Eddie Cibrian, first met.

Rimes was married to Sheremet from 2002 to 2010, while Glanville was with Cibrian from 2001 to 2010 and had two sons. In 2011, Cibrian and Rimes got married.

On the former Real Housewives of Beverly Hills star's podcast, Brandi Glanville Unfiltered, the exes talked about how they both knew their relationships were over in the same moment. "Do you remember when we were playing pool in Canada?" Glanville asked. "I mean, like, vividly."

WATCH: LeAnn Rimes' Ex-Husband Dean Sheremet Details Her Cheating, Blasts Eddie Cibrian

"It's weird that you say that moment, because that was the moment that I knew that it was kinda, it was it," Sheremet, 35, admitted. "That was a very, very bizarre thing and it was the beginning of the end."

"I just got the chills," Cibrian's ex exclaimed. "There were other things, but in that moment in time is when it all, I was like, 'Holy f**k, this is happening.' And it was so bizarre to me, because I knew it, but I didn't want to believe it. And I feel like you were kind of in the same boat, maybe?"

WATCH: Brandi Glanville Says LeAnn Rimes Put Her Through 'Hell' During the Holidays

Sheremet agreed, adding, "I don't think I wanted to believe it up to the point where I signed my divorce papers. You don't want to believe it."

Glanville quipped, "Oh, I didn't sign mine. That motherf**ker had to work to get my signature, and then I got nothing." Sheremet responded, "Welcome to the club."

MORE: LeAnn Rimes and Eddie Cibrian's Holiday Card Is Delightfully Awkward

While Glanville, 43, shares custody of her two sons, Mason and Jake, with Cibrian, Sheremet said he was happy he never ended up having children with his ex-wife. "That was the one thing that I was really thankful for, that we didn't have kids. It made it a much cleaner break," he explained. "For you, unfortunately, it was living in L.A., and the love triangle, and kids involved, and the back and forth. I feel your pain."

After a very tumultuous few years, Glanville says she does not "have an issue" with her 42-year-old ex and his new 33-year-old wife. "I always sit with them, or near them at, you know, the school events," she said before adding, "It ebbs and flows. I wish that we could get along, and then, you know, something will happen with the kids."

WATCH: Brandi Glanville Says She and Eddie Cibrian Have Drastically Different Parenting Philosophies

When ET spoke to Rimes this past year, she said she enjoyed being a parent figure to Cibrian's sons, but didn't like the "evil stepmom" label that came with it. "I just kind of let the B.S. roll off," the country singer said. "People's attitudes -- it's like, 'God bless you for thinking that, and you really don't know my situation. Thanks for the input.'"

PHOTOS: Leann Rimes and Eddie Cibrian in happier times