Mario Singer showed off the woman who came between him and his ex-wife Ramona Singer. Click through RadarOnline.com's gallery to see all the photos of the scandalous couple.
Mario Singer recently brought girlfriend Kasey Dexter as his date to a 25A cover party to fete Geraldo Rivera on Sept. 28.
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"When they came in, people were shocked he was with her," an attendee at the party, held at Four Cuts in New York City, tells RadarOnline.com. "They couldn't believe they were still together."
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While Singer's ex-wife, Ramona, was nowhere to be found, Jill and Bobby Zarin as well as Sonja Morgan were in attendance.
Ramona Singer at the pool in Miami
As Radar reported, Dexter is said to be the reason the Singers' marriage ended.
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Dexter has been living in Florida, but she announced on Facebook that she loves "being back in NYC where it all began!"
She called Singer her "favorite person" and gushed that she was "feeling loved" on a Facebook post.
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Singer "reluctantly posed" for pictures, but Dexter wanted to have her photo taken, the eyewitness tells Radar.
"They had their arms around each other," says the onlooker. "The were very affectionate."
The couple stayed briefly and left together. Dexter is expected to return to Florida shortly.
Meanwhile, Ramona's new boyfriend Thomas D'Agostino Jr. has already been caught chatting up other women while out on the town.