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Real Housewives of New York City Reunion Showdown: Cindy vs. Sonja

By Brian Orloff

07/20/2011 at 02:45 PM EDT

Put seven Housewives in a room, ask a heated question about etiquette and you'll get 37 different opinions – plus raised voices, pointed fingers and general exasperation.

With The Real Housewives of New York City wrapping up a lively season this Thursday, the ladies – Jill, Kelly, Alex, Sonja, Ramona, LuAnn and Cindy – reunited to rehash all their personal drama in a two-part reunion special, and PEOPLE.com has an exclusive first look at the action.

With blondes and brunettes separated on different couches, the ladies begin to address Cindy's possible etiquette breach – taking a business phone call during a breakfast at Sonja's home. As Cindy explains herself – even rising from the couch for extra emphasis – Kelly defends her castmate, telling Sonja, "She's a working woman with two kids. ... If I came to your house and I had a call, I would take it. Sorry."

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"I was cooking for her," retorts an exasperated Sonja, who has Alex and Ramona – and even LuAnn – on her side.

Immediately, though, the discussion turns into a free for all as all seven ladies join the fray, talking over each other and loudly arguing about who was right: Sonja or Cindy.

"Once again, Sonja, I don't hang around here to have you teach me," says Cindy. "The last person I would ever have etiquette [lessons] from is you with your butt hanging out [and] your boob hanging out."

Leave it to Kelly to (attempt to) get the final word. "I gotta be the peacemaker," she says.

Says host Andy Cohen: "You're not."

Case closed?

Tune in to find out: Real Housewives of New York City's two-part reunion airs early – with part one beginning July 25 (10 p.m. ET), and part two airing Aug. 1 (10 p.m. ET) on Bravo.