What goes around comes around, especially for Ramona Singer‘s ex-husband.

A source told Page Six on Wednesday that Mario Singer dumped his mistress-turned-girlfriend Kasey Dexter after using a hidden camera to catch her having an affair in their West Palm Beach, Fla., home.

Kasey, 36, met her new man in November and Mario, 64, found out about her tryst on Christmas, our source told us.

Kasey and Mario first got together in 2013 while Mario was still married to the “Real Housewives of New York” star. Ramona, 61, and Mario split in 2014 and their divorce was finalized in 2016.

“Mario told Kasey he’ll never marry her or have kids with her, so she f—ked up,” our source told us, claiming that he “emotionally abused her” and told her that “she’s only good for fake tits and fake lips.” The source also claimed that Mario had physically abused Kasey in the past, fracturing her hand during one altercation.

Once Mario discovered Kasey’s affair, she woke up one morning and “there were eviction papers” on her door.

“He gave her 30 days to move out, but she didn’t want to go anywhere because it was her home,” our source said, adding that he allegedly offered Kasey thousands of dollars to vacate the premises but never coughed up the cash.

Mario called the police on Kasey on Feb. 1 after he returned from New York and found her still residing in their oceanfront home, the source said. The responding officer noted in the Boca Raton police report obtained by Page Six that both sides “confirmed that the argument was verbal in nature and nothing physical had taken place” and “[Kasey] still had residency rights to the property.” They “confirmed that they would be staying in separate bedrooms for the remainder of the evening” and the police left.

Kasey has since applied to new apartments, but “she’s living out of bags now. If she goes back, she’ll get arrested for trespassing and all her stuff is there. She’s going to have to go back to their apartment with a police escort,” our source claimed.

Despite Kasey leaving the former couple’s home, Mario is still out for revenge. “He told her that he wants to ruin her life and bring her down. He’s a man scorned,” the source said.

Still, our source insists that “Kasey didn’t mean to hurt him, she just fell in love with someone else.”

Mario did not return our request for comment.