06/03/2011 at 07:00 AM EDT
"I don't think the way this went down was treated with class or dignity," says Donn, Vicki Gunvalson's estranged husband
, of the reunion show for The Real Housewives of Orange County
's sixth season.
Between the screaming, the tears and the eye-rolling, there's going to be plenty of insults and accusations – all of which can be seen in a just-released, minute-long trailer for the upcoming episodes.
Tamra Barney, whose troubles with her ex
and a new romance
have been documented on the show, seems to be at the center of the storm.
"You were sleeping with another guy while your fiancé was dying," she says to Gretchen Rossi, who was engaged to the late Jeff Beitzel.
At one point in a clip of the show, which will air starting June 12 (9 p.m. ET) on Bravo, Tamra shrieks, "Is your ass jealous of the s–– that comes out of your mouth?"
She also accuses Jeana Keough of lying and gets into an argument with Gretchen's boyfriend, Slade Smiley, who accuses her of ... uh, promiscuous behavior.
"You're the lowest form of s–– in the world," Tamra says as she storms off the set.