A stint in jail was not enough to slow down Mario Singer’s wild mistress Kyle “Kasey” Dexter. Just days after she was arrested for disorderly conduct in NYC, Breaking Celebrity News has learned, Dexter jetted to Las Vegas, where she escorted out of the Venetian hotel because of her “out of control” boozing and partying!

Dexter — who infamously bedded Ramona Singer’s husband — traveled to Sin City for a pal’s Bachelorette bash. But the trip took a dark turn when she began “downing drinks” and acting “erratically,” the sources said.

“She was acting very odd and drinking way too much alcohol,” an onlooker told Breaking Celebrity News. “She was out of control and eventually security escorted her off the premises because she was sloppy and could barely stand up on her own.”

Dexter posted a photo of her entourage partying at Tao Beach club at the Venetian Hotel on May 9.

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