‘Housewives’ not holly, jolly

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

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

A source told us 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 NBC-Universal.

“Why bite Andy? Why bite NBC?” de Lesseps asked. The audience cheered as the “Money Can’t Buy You Class” singer continued to slam the Skinnygirl founder.

“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 Luann’s gig.

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

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

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

In September, she dragged Cohen for asking “gross” and “problematic” questions on his Bravo late-night show, “Watch What Happens Live.” However, earlier this month Frankel clarified that she has “no personal vendetta against” Cohen.