Ramona Singer Divorce 2014: Husband Mario Goes Public With Mistress Kasey Dexter

Ramona Singer's husband stepped out with his mistress over the weekend.

Days after the Real Housewives of New York City star told fans on Twitter that she was moving on from her marriage, her husband, Mario, went public with his mistress, Kasey Dexter, in The Hamptons.

"Mario Singer and Kyle 'Kasey' Dexter looked 'very flirty' at the Women's Health Party Under the Stars in Bridgehampton, New York, on Saturday night," an onlooker told PEOPLE Magazine on Aug. 11. "The two were also photographed together in Sag Harbor."

Reports of Mario and Kasey's relationship first surfaced in Oct. 2013 and claimed the pair began their affair in early summer. Many reports also alleged Mario had gotten Kasey pregnant. After a reported abortion, their relationship continued, and at one point, Kasey suspected she may be pregnant again.

In Jan. 2014, after an alleged domestic dispute in which Ramona claimed Mario choked her, the reality star filed for divorce. However, weeks later, the pair reconciled and were spotted with each other in New York City.

Things appeared to be going well for the reunited pair up until early this month, when Mario and Kasey were photographed together again. In photos obtained by In Touch Weekly, the couple was seen at brunch on Aug. 2 at NYC’s Anassa Taverna.

On Aug. 7, Ramona tweeted, "I have decided to move on with my life without Mario. I tried my best to make my marriage work. I am excited for the new chapter in my life."