Leah McSweeney, 37, has slammed he costar Ramona Singer, 63, for gossiping about her mental health, stating Leah has bipolar disorder.

On Thursday’s episode of The Real Housewives of New York City, Ramona told Sonja Morgan that she heard Leah is bipolar and believed it could be the reason why Leah acted the way she did at Ramona’s birthday party.

Ramona told Sonja, “I found out she’s bipolar and she’s on medication and I know people who are bipolar and you cannot mix alcohol with meds, it makes you act not responsible. It’s actually very dangerous.”

The 63-year-old explained that she found out about Leah’s bipolar disorder through a friend. She said, “They go, ‘Ramona listen, this Leah girl, she writes a blog and on a blog she says she’s bipolar.’”

Ramona vented to Sonja, revealing that she was still upset with Leah over what happened at her birthday party. Sonja said, “You said she lifted up her skirt. She said she didn’t.”

Getting emotional over the incident, Ramona said, “I had to run over to her and pull down her dress.”

Meanwhile, Leah told Dorinda that she too was “hurt” by Ramona for talking about her mental health.

Leah told Dorinda, “Whatever, I don’t care about the party. She’s saying I showed my vagina to people, which is demeaning and it’s a lie and whatever. But when you start talking about ‘Leah has depression, she’s on pills,’ it’s a line that you don’t cross.”

Dorinda asked Leah, “When did you share this with [Ramona]?” Lead replied, “I didn’t. She must’ve done some digging.”

Leah confessed in an interview, “Right before the trip to Mexico, Sonja called me and she let it slip out that Ramona was gossiping about me having bipolar disorder, which I find repulsive as f***.”

“I was diagnosed with bipolar 2 disorder on my 30th birthday and really dedicated the last seven years of my life to getting it under control and to getting myself in a good place. I’m not even on medication, so for her to be talking about it in this way is despicable,” Leah revealed.

Lead said of Ramona, “The sum of who you are is how you treat other people … and right now the way you’re treating people is less than f***** zero,” adding, “Don’t talk about my vagina and don’t talk about my mental health.” You can read more about Leah and Ramona’s conversation on PEOPLE.