Kim Richards Rehab: Sister Kyle Richards Blogs "Real Housewives" Finale Explanation

It wasn't a catfight between Camille Grammer and Kyle Richards that ended the season of The Real Housewives of Beverly Hills last night, but one between Kyle and her sister Kim Richards. How did it all end? Well, Kim was checked into rehab!

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Kim, 46, was checked into rehab by her family at the end of last night's show, the New York Daily News reports.

After seeming to have had too much to drink (according to NY Daily News), Kim and Taylor Armstrong got into a fight during her birthday party about a previous fight they had in NYC.

But then Kim and Kyle got into it and Kim called her a "f**king phony" in the limo to which Kyle called her "delusional" and "demented."

But then the fight took a different turn.

"You are a liar ... [and] you are an alcoholic!" Kyle told Kim. "Yeah, that's right. I've said it now, and everybody knows."

"You are so sick," she added. "My husband has helped you every month and stood by you and taken care of you, okay, like you're his second f**king wife!"

A written banner then appeared announcing Kim was checked into rehab by her family, but then she checked herself out a week later. It also said the two sisters have not spoken since their fight.

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But Kyle took to her Bravo blog after the show to clear up what you didn't see in the episode.

"After this horrible argument between Kim and I, we didn't speak for a long time. My heart was broken and I suffered an incredible amount of anxiety and panic attacks," Kyle wrote. "Next to losing my mother, this was the most difficult time of my life. It is so difficult for me to even write about it now.

"The details of what happened with Kim after that night, is her story to tell. I will not go into that here," she explained. "I do want to say that I have learned a lot about my sister and myself during the taping of this show. I have been able to look at our relationship from an outsider’s point of view. I've realized that my pain and worrying about her comes off as anger. It was not helping Kim or our relationship. I love my sister and only want the best for her. Kim knows that."