"Do you want me to talk about any of the stuff that's going on in your life?" Frankel says to Ramona Singer during a heated argument in an exclusive sneak peek at the first installment.
Adds Frankel, 44: "I know where all the bodies are buried."
In the special Singer, 58, opens up about catching her estranged Mario with his mistress in the couple's kitchen – but that's just the start of the drama that host Andy Cohen uncovers.
RELATED VIDEO: RHONY's Ramona Singer Dishes on Ex-Husband Mario: He's 'Dead' to Me
When the What Watch Happens Live host asks LuAnn de Lesseps if she was "with a married guy," the Countess can barely stammer "apparently …" before Carole Radziwill chimes in with a point-blank response: "He was wearing a wedding ring."
Even though there was no shortage of excitement during the show it still wasn't enough to keep a drowsy Singer engaged in all the back-and-forth.
"Did you just fall asleep?" Cohen, 47, asks the reality star after she dozes off.
The three-part Real Housewives of New York City reunion begins Tuesday at 9 p.m. ET on Bravo.