'Vanderpump Rules' SURver Scuffle: Rob Valleta Accused of Cheating on Scheana

After Jax Taylor confessed to cheating on Brittany Cartwright with former SUR server Faith, and Lala Kent outed Tom Schwartz for drunkenly making out with her friend while married to Katie Maloney, new allegations surrounding another "Vanderpump Rules" couple -- Scheana Marie and then-boyfriend Robert Valletta -- surfaced on Monday night.

Kristen Doute found out that Rob made out with a random girl the night of Lisa Vanderpump's Vanderpump Dogs opening party. She then confided the news in Brittany, and the two confronted Scheana.

"We have to talk to you," Kristen began. "It has to do with Rob. The night of the Vanderpump Dogs opening, we all went to El Carmen after that, so right before El Carmen, he went to Toca Madera and he kissed some chick -- a hostess. And the hostess literally pulled up a photo of the two of you, and she goes, 'Oh, isn't this your girlfriend?' And he was like, 'Well, I don't know if she's my girlfriend.'"

"I already know this is bullshit," Scheana interrupted. "It's just funny timing. Jax cheats, Schwartz cheats, and now it's like, 'Oh, Rob kissed a girl.' It's f-cking bullshit. I honestly don't believe any of this. The funny part of this is him and I don't even kiss a lot because he isn't a kisser. He's just not. He's very affectionate in every other way, but we don't kiss a lot, so for him to walk in and kiss someone is, like, laughable."

"I know for a fact that it actually happened," Kristen insisted. Scheana was not having any of it.

Scheana and Rob ended up splitting up in October, saying they are "still amazing friends" who "adore each other."

Elsewhere, Katie and Lala squashed their beef, and Tom agreed to start working on not getting blackout drunk to avoid making out with strangers. Unfortunately for Brittany, things seem to be getting worse and worse.

In an effort to try and move forward from their situation, Jax and Brittany decided to keep their plans of throwing a housewarming party for all of their friends -- most of whom thought it was a terrible idea.

They were right.

While at the party, Lala told Ariana Madix she had "disgusting, despicable" audio footage of Jax telling Faith after they had sex that he's never going to marry Brittany. Faith originally sent it to James Kennedy, who later shared it with Lala.

Lala and Ariana pulled Brittany aside to make her listen to the recording, because as Lala said to Ariana, "Would you rather ruin her night or ruin her life?"

"You're a piece of shit," a devastated Brittany fired at Jax after she heard the tape. "You're a piece of f-cking shit. I heard the recording. You deserve to rot in hell. F-ck you. Get the f-ck out of here, you piece of shit. You deserve to rot in hell."

"Vanderpump Rules" airs Monday nights on Bravo.