The claws are coming back out for the Real Housewives of New York City's third season opener.

This time, the Housewives gang up on mom-to-be Bethenny Frankel, and it's not pretty. When we last left the Housewives, Frankel, 39, was BFF with Jill Zarin, but things turned sour after Frankel angrily told her pal she needed to find a new hobby -- and stop meddling in her life.

"I found a new hobby and it's not hanging out with [her]," Zarin snipes to Kelly Bensimon in a clip of the show's March 4 premiere. (Watch above)

Bensimon, who locked horns with Frankel last season after she said Bensimon had an "inauthenticity" to her, isn't ready to make nice just yet.

Revisit reality TV's most memorable catfights.

"She's scary," Bensimon seethes. "I would never cross me because she'd attack me or say something bad. I was like, 'that does not a friend make.' It's weird. That's not a friend, that's a foe. She's got issues. I mean, come on, she 'invented the margarita,' Bensimon says, taking a dig at Frankel's investment in the SkinnyGirl margarita franchise.

Check out the full episode of The Real Housewives of New York City March 4 at 10 p.m./ET on Bravo.