Luann de Lesseps bashes Bethenny Frankel at Christmas cabaret show: ‘Why bite the hand that feeds you?’

Luann de Lesseps roasted her former “Real Housewives of New York City” co-star Bethenny Frankel over her “reality reckoning” during her sold-out holiday cabaret show.

“Now back to Bethenny. You know, listen, why bite the hand that feeds you?” de Lesseps said while performing her show, “A Very Countess Christmas,” at 54 Below in New York City on Saturday night, according to a video exclusively obtained by Page Six.

A source tells us that de Lesseps was responding to a fan who asked about her thoughts on Frankel.

The Bravolebrity, 58, then slammed Frankel, 53, for also going after Bravo executive Andy Cohen and NBCUniversal.

“Why bite Andy? Why bite NBC?” de Lesseps asked.

The audience cheered as the “Money Can’t Buy You Class” singer continued to dig into the Skinnygirl founder.

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“You know, just go off into the sunset,” she said of Frankel. “You make millions and gazillions of dollars. If you claim you do, then why are you still harping on us? Why are you talking about us?”

De Lesseps then cheered, referencing Frankel’s popular phrase in the show, “Leave us alone! Go to bed! Go to bed! Go to bed!”

Our source said that the audience went “wild” for de Lesseps’ performance in the Big Apple.

“It was a full house and the audience was going nuts,” our source said, adding, “I needed three martinis.”

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The wild Christmas show was a precursor to de Lesseps’ upcoming “Marry F Kill” tour — which will kick off early next year, and play cities including Los Angeles, Boston and London.

Frankel has been going after Bravo and NBC in a quest for better treatment for reality TV stars.

This summer, Frankel launched her war on NBCUniversal and Bravo with a striking lawsuit that claims reality stars are manipulated, plied with booze and the victims of revenge porn.

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The entrepreneur is allow reality TV stars to break their nondisclosure agreements to expose the alleged mistreatment.

In September, she has “no personal vendetta against” Cohen. 

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Meanwhile, in October she doubled down on her intentions to help create “systemic change” but noted that she is not suing the network.

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“I’ve now spent time with and understand many of them — absent of cameras, publicists, media articles, and shows designed to bring out our worst. I adored many of them long before reality tv, and began to strongly dislike many of them,” she wrote on Instagram at the time.”

She continued, “To be successful in reality tv, you must kill or be killed. To not get dirty is to get fired. Someone is winning and someone is losing in this zero sum game where people like myself get rich and the less strategic go broke or get cancelled.”

Upon being met with backlash, she also argued that “hand deserves to be bitten.”

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“We have fed the machine ratings, ad dollars, catch phrases and content. We get filthy and they get filthy rich,” she said at the time.

Frankel and de Lesseps — who helped launch “RHONY” in 2008 —  have a history of feuding and have thrown barbs at each other throughout the years.

Frankel’s rep did not immediately respond to Page Six’s request for comment.