'RHONYC' Season 11 Spoilers: Luann de Lesseps 'Doesn't Give a S**t' About Hurting Bethenny Frankel's feelings [Sneak Peek]

Luann de Lesseps has barely cleared the air about her drama with Dorinda Medley, and already the Real Housewives of New York City star is cooking up a whole new round of beef with Bethenny Frankel. On the upcoming episode of Season 11, airing Wednesday, Luann will really let her ungratefulness show when she disses her castmate, despite the wave of support Bethenny offered her last season.

It all started when Sonja Morgan informed Luann that she hurt Bethenny's feelings during their recent group trip to the Berkshires. During an alcohol-fueled weekend at Dorinda's Massachusetts estate on last week's episode, Luann got upset when she was forced to sleep in the Fish Room while Bethenny was given a better room, even though the Skinny Girl empress arrived at the Berkshires mansion a whole day late.

"She was hurt that you were saying, 'Why is Bethenny's room being held? She's not the queen! I should have a room.' When she got together with Dorinda and Tinsley, they told her. And I was like, 'Ohhhh my god.' I could see that Bethenny was visibly shook up. She was hurt," Sonja explained in the episode sneak peek.

Luann wasn't the least bit concerned whether Bethenny was offended by her comments. "If Bethenny's upset because I said, 'You should have given me that room,' then let her be upset. I don't give a s**t," Luann said.

Ramona Singer, who was also in attendance for Lu and Sonja's beauty parlor pow-wow, was flabbergasted Luann would say such a thing about Bethenny, especially after the way Bethenny stood by her side during Luann's bouts with rehab and her highly publicized arrest last year.

"I cannot believe she's rolling her eyes after everything Bethenny did to help her during the summer when she was basically on her flat a**, or I should say basically 'on her flat drunk a**.' Wow. Not cool, Luann. Not cool," Ramona said to greenroom cameras.

Sonja seemed to agree. "She just did all these great things for you," Sonja said to Luann. "She just got you a lawyer … the intervention. You remember?"

"Of course I remember and I appreciate all she's done for me. The least she could do is give me that goddamn room!" Luann joked.

Although Luann recognized how much Bethenny has supported her in recent times, the reality star noted their friendship hasn't always been the best. "With Bethenny, I never know where I stand with her. One day she's saving my life and the other days she's bashing me over the head with a baseball bat," Luann said in a confessional.

Real Housewives of New York City airs on Bravo on Wednesdays at 9 p.m. ET.