In the fall of 2016, Stephanie Delpe was an insurance executive mingling at a networking event at a Newark hotel when a handsome man approached her.

“He looked expensive,” Delpe told The Post. “He told me, ‘I just flew into Teterboro,’” the exclusive New Jersey airport used by private planes.

The man introduced himself as William Benson and regaled Delpe with tales of his life as a wealthy entrepreneur who’d founded his own brand of champagne, Billionaires Row. He also said he ran an investment fund and had once worked at Goldman Sachs.

Within weeks, Delpe found herself in a whirlwind romance with the charming, well-dressed businessman, who regularly highlights his friendship with Mayor Eric Adams on social media.

But now Delpe and several others have revealed to The Post that they were duped out of money by Benson, 39, and claim that he drops the mayor’s name to appear impressive.

“He wooed me out of my savings,” Delpe told The Post. “That’s what happened.”

At first, she had no reason to doubt Benson’s story, particularly after checking out his social media presence, where Benson advertises his ties to celebs: Ja Rule and Gayle King, the Kardashians, Hillary Clinton. Even today, Benson boasts a boldface cast on his Instagram page — and one of the people he features most prominently is Mayor Adams.

Over the year that Delpe and Benson dated, they enjoyed dinners at flashy Big Apple…