Gretchen Rossi took aim at her former co-star, Tamra Barney, in a new interview.

Tamra Barney Updates Fans On Relationship With Former 'RHOC' Co-Star Gretchen Rossi

Years after the two women starred alongside one another on The Real Housewives of Orange County, even enjoying a brief friendship, Rossi called out Barney for being a "monster mom" whose own daughter, 16-year-old Sidney, can't "stand her."

“Tamra called Slade a deadbeat dad, which is completely untrue because he has a great relationship with his son. What is funny about all of this is that now SHE is a monster mom!” Rossi told Radar Online on Thursday. “Her own daughter cannot stand her and does not want to see her anymore. This is a fact.”

Gretchen Rossi On Vicki Gunvalson & Brooks Ayers: 'Go With Your Heart'

During their time together on the show, Barney made a spectacle after learning Rossi, whose then-fiance, Jeff, was ill, had gone to the lake. Years later, during another season, Barney was at odds with Rossi yet again, and this time, it was Rossi's fiance, Slade Smiley, whom she had an issue with.

“Although there is a compassionate side that wants to feel bad for her, there is also a side of me that is like ‘you know what? Karma really is a b***h,'" Rossi continued. "Tamra knew that what she was saying about Slade at the time was not true and that it was not right of her to do.”

Following the eights season of The Real Housewives of Orange County, Rossi left the show and has since been focused on her handbag and makeup lines.

Tags: Gretchen Rossi Tamra Barney Bravo Reality TV The Real Housewives of Orange County