09/29/2011 at 01:15 PM EDT
The Real Housewives of New York City
are already down four cast members
for the upcoming season, and now one of their New Jersey
counterparts is on her way out the door.
"Jacqueline [Laurita] definitely quit," a source tells PEOPLE. "She had to walk away for her sanity."
In a series of Tweets earlier this week
, the Real Housewives of New Jersey
star hinted that she's done with the show, and even said she did not want to appear on the show's season 3 reunion, which taped on Wednesday.
"I feel nauseous and feverish," Laurita Tweeted late Tuesday night, after attending the annual fashion show for the boutique Posche, a scene of past drama on the hit Bravo show. (Cameras, meanwhile, were there and already rolling on season 4.) "No reunion for me. Sorry guys. XOXO!"
She later elaborated: "Someone (not me) got set up tonight. There are some sneaky people trying to make someone look bad & then play innocent on camera. Sad."
A source tells PEOPLE that Laurita "had no intention of going to the reunion, and the other women weren't expecting her to turn up."
Meanwhile on her Twitter account, costar Teresa Giudice also hinted at tensions at the fashion show – and with Jacqueline – writing, "I don’t even wanna go there b/c I don't fight on twitter not w/ fans, not haters, not w/ mean RTs & def not w/ a friend (ahem) or my family!"
Giudice also wrote
on Wednesday evening: "The rumors are getting ridiculous. Let’s get this straight: I LOVE my WHOLE family. Would never do anything to hurt them."
The show lost original cast member Danielle Staub
last year, and returned with new cast members
Kathy Wakile and Melissa Gorga
for its third season.
"I can't be part of the Charade anymore," Laurita Tweeted Wednesday. "It's unsettling. It's disturbing & against what I stand for. I'm a REAL housewife."
Later, she reiterated her point, writing, "I'd like to only focus on positive things now please. I threw the trash out.I'm cleaning now and reorganizing.Starting fresh and new."
When reached, Bravo reps had no comment.