RHOC Reunion Clash: Accusations Of Cheating, Threesomes, 'Mean Girl' Bullies & Plenty Of Tears Shed

We've got a preview of The Real Housewives of Orange County's reunion special, and it's clear there are plenty of hard feelings circulating through the O.C. from the fightin' words traded in the clip.

"Are you saying to me that I had sex with another man and woman at the same time?" Vicki Gunvalson shouts to arch-rival Lauri Peterson, later accusing her of cheating on her partner.

In another, Alexis Bellino barks, "The way you behave is 100 percent a mean girl bully!"

Tamra Barney, with a list of grievances in hand, says, "I took a lot of s***, for many years, because you said I was a liar!"

Gretchen Rossi's temper also flares up, as she shouts, "Why is it ok for you guys to do everything and nobody else can do it, it's bulls***!"

In another excerpt, Gretchen's clearly despondent, crying and saying, "That hurt me more than anything anyone has been said."

And Vicki's daughter Briana Wolfsmith-Culberson gets in the act as well, yelling (presumably about Vicki's on-again, off-again beau Brooks Ayers), "He talked to me about his d*** size!"