Kathryn Dennis is convinced her former boyfriend, Thomas Ravenel, cheated on her while she was expecting their child.

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Although there doesn't appear to be solid proof of any such thing, Dennis, 23, recently alleged on Facebook that Ravenel, her co-star on Bravo's Southern Charm, slept with one of her best friends.

Ravenel, 52, “had sex with one of my best friends while I was pregnant,” Dennis reportedly wrote on Facebook, according to a report by Fits News last week. “I typically never retaliate, or rather acknowledge such disgusting behavior. However, since he chooses to publicize our life, here’s just a *tid bit* of the truth.”

'Southern Charm' Star Thomas Ravenel Goes On Facebook Rant About Kathryn Dennis

Ravenel and Dennis began dating during the first season of Southern Charm, and broke up after experiencing relationship issues during season 2.

According to the report, Dennis shared the message at 4 a.m. two Sundays ago, and deleted it a short while later. However, the drama between the former pair has continued.

In response to Dennis' post, Ravenel took to Facebook, as well, telling fans he was an "idiot," and claiming Dennis recently revealed plans to propose to Ravenel prior to their breakup.

"I’m great in business but my personal life sucks! … Not only that but she’s telling everyone that physically assault her which is not only hurtful but blatantly false. My lawyer is right. When I see her I should run," Ravenel wrote.

For more of Kathryn Dennis and Thomas Ravenel, tune into Southern Charm on Mondays at 10 p.m. on Bravo.

Tags: southern charm Reality TV Bravo thomas ravenel kathryn dennis