Jill Zarin laid into Ramona Singer just hours after the season 7 premiere of The Real Housewives of New York City.

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Following the premiere, Singer appeared on Watch What Happens Live, where she denied Patti Stanger's claims of having caughter her husband, Mario Singer, cheating on her in The Hamptons. After hearing what Singer had to say, Stanger and Zarin fought back.

"I am not a liar tweeties and have never ever been one. I was at hamptons party with @Jillzarin and saw Mario cheat. True dat!" Stanger wrote on Twitter on Wednesday. In response, Zarin added, "So true. So jealous of you Patti and very sad. You wonder why he doesn't want her anymore?

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Ramona and her husband parted ways last summer after months of allegations regarding his alleged affair with Kasey Dexter. However, while Ramona and Mario are no longer together, she took offense to Stanger's comments, and Zarin wasn't thrilled with Singer's comments.

"[Singer] was very nasty on Andy show about me tonight I heard. Not nice!" Zarin wrote. "I haven't even thought of her in a year. She is still a mean girl and never grew up."

On Watch What Happens Live, Ramona recounted the moment she heard of Stanger's allegations.

"I almost wanted to call her," Ramona explained, according to report by E! News on Wednesday. "And say like, 'What the heck are you saying?' But I thought, you know what, I'm not doing that. I think she's a little bit like Jill [Zarin]. She likes to be relevant in the press by using other people."