Vengeance Is Vicki's! Gunvalson Blasts 'Miserable' Lauri Peterson, Accuses Her Of Cheating, On RHOC Reunion

Lauri Peterson's been a rock in Vicki Gunvalson's Louboutins all season, and on Monday's Real Housewives of Orange County reunion special, the fur flew as Vicki blasted her former friend for her rumor-mongering -- and accused her of cheating on her husband George, for good measure!

As we previously reported, in Lauri's return this year, she dished a series of embarrassing revelations about Vicki and her on-again, off-again beau Brooks Ayers, as revenge for Vicki circulating an inflammatory e-mail about George sent by his former mother-in-law.

On Monday, "The O.G. From the O.C." asked Lauri point-blank, "Are you miserable in your own life that you have to destroy others? Leave me alone!"

Lauri admitted she still holds a grudge against Vicki over the e-mail, to which Vicki said, "That was seven years ago! Let it go!"

Vicki was on the offensive, telling Lauri in front of the women, "I've also been told from some of your neighbors that YOU were cheating."

"Oh my God, that never happened," Lauri responded, to which Vicki said, "Of course you're gonna deny it … that's what you do: Deny, deny, deny!

"I'm a monogamous girl, I love monogamy, I think relationships are perfect -- when one cheats, everything's over."

Lauri again stated, "I have never cheated on any of my marriages," with Vicki shooting back, "Well that's not what I heard!"

An angry Lauri told her arch-rival, "I don't care what you hear -- I never cheated!"

With perfect comedic timing, pot-stirrer extraordinaire Andy Cohen picked the tense time to state, "Well I just wonder if there's any hope for the two of you, your friendship."

"It's kind of done," Vicki said.

Watch the video on RadarOnline.com

Part two of the Real Housewives of Orange County reunion airs on Bravo Monday at 9/8c.