'RHONY' Bad Apple of the Week: Dorinda Severs Ties with Luann, Ramona Attacks Bethenny, Sonja Gets Naked

Aside from Sonja Morgan's red dress flying off mid-song ("Gimme a little credit -- all my dresses are trained to come off after 11!"), Luann's premiere was a total success.

Everyone had a blast -- everyone except for Dorinda Medley. Luann didn't let Dorinda bring her boyfriend because she claimed the request was too last minute. So when Dorinda found out Lu told Tinsley Mortimer she could bring her boyfriend with almost no notice, she lost her marbles.

To make matters worse, Dorinda provided Lu with all of her dresses for the evening, so during the show, the tipsy reality star loudly yelled the designer's name -- Jovani -- every chance she got.

The ladies were mortified, and at the after party, Bethenny and Sonja discussed Dorinda's angry outbursts. "She needs to go away like Luann did," Sonja told Bethenny Frankel, who agreed "100 percent."

"If you're drinking and you're getting angry and it's affecting your relationships, rehab could be great," Sonja said. "Luann said it was fabulous. She enjoyed it. I'm not judging anyone. What do they say about glass houses? I can't say a word. I'm just saying she might like it."

Shortly after arriving at the party, a still-pissed off Dorinda bid her goodbyes to Bethenny and Carole Radziwill, and when she walked away, the two bonded over how that was probably a good move on her part.

They then transitioned into what they both called a "normal" conversation between two friends. Who woulda thought? But that was short lived because Ramona Singer walked up to Carole and insisted she stay for the remainder of the conversation, even though Bethenny asked her numerous times if they could finish chatting privately.

"I have something I'd like to speak to you about -- and [Carole] could be here or not be here -- so give me a time frame," Ramona said to Bethenny, to which she sarcastically replied, "You'll have to call my secretary, and I'll give you an appointment."

Visibly taken aback, Ramona went on to tell to Bethenny she was "very disappointed and hurt" that her co-star not only missed her skincare line launch party, but that she also didn't respond to the invite.

"I hear you. Okay? Good. I understand that you're disappointed, and I got it," Bethenny replied. "Noted. I don't feel the need to give you an explanation."

Ramona was fuming. Carole excused herself while the two duked it out, but the discussion didn't make much progress. Bethenny later vented to Bravo cams, saying she had never seen any of Ramona's supposed businesses succeed, so she "didn't take it seriously."

Ramona stormed off and found Carole so she could vent. Carole's advice? "Lower your expectations a little and know who people are so you're just not disappointed all the time."

Bethenny then found herself at the center of yet another dramatic conversation when she decided to ask Luann why she invited Tinsley's boyfriend and not Dorinda's. Lu tried to be PC about it all but eventually told Bethenny the truth: She was still mad about Dorinda's explosive comments about her in Cartagena.

Dorinda and Luann eventually came to face to face -- in front of everyone -- to discuss the matter. Dorinda was saying all the right things to diffuse the situation until: "Thank you so much for having me, and thank you so much for inviting Scott last minute."

Lu tried to have a conversation with Dorinda, but the latter wasn't having it and stormed off -- for real this time. Before the credits rolled, text appeared on the screen with an end-of-season update, revealing the two "remain estranged."

"The Real Housewives of New York" Season 10 reunion starts Wednesday, August 29 at 9 p.m. on Bravo, though Lu won't be part of it due to her return to rehab. Appearing on "Megyn Kelly TODAY" this week, she said things between her and Dorinda "are still not cool, which is unfortunate."