Second gentleman Doug Emhoff’s ex-girlfriend said she was left “embarrassed and humiliated” when he slapped her so hard, she “spun around” at the 2012 Cannes Film Festival.

The woman, a New York attorney identified only as “Jane,” broke her silence weeks after her disturbing claims emerged, telling the Daily Mail that she was trying to persuade a valet to give her and Emhoff special treatment when her beau struck her in the face.

“As I’m talking to him, Doug got out of the line, comes up, turns me around by my right shoulder. I’m completely caught off guard, I’m not bracing, I’m in four-inch heels, wearing a full-length gown and it’s between 2-3 a.m.,” she told the Mail. “He slaps me so hard I spin around, and I’m in utter shock.”

“There had been no fight, no argument,” she added. “In that moment, his mask had dropped and I saw his dark side.”

Earlier this month, friends of Jane had come forward claiming Emhoff assaulted her at a Cannes event in May 2012.

A spokesperson has vehemently denied the accusations, telling Semafor, “any suggestion that he would or has ever hit a woman is false.”

Jane ripped Emhoff for his squeaky-clean public persona as Vice President Kamala Harris’ supportive husband.

“What’s frightening for a woman that’s been on the other end of it, is watching this completely fabricated persona being portrayed,” Jane said.

“He’s being held out to be the antithesis of who he actually is. And that is utterly shocking.”