Brandi Glanville, Kim Richards: 'RHOBH' Star Defends Friend's Sobriety On Twitter [VIDEO]

Brandi Glanville stood up for Kim Richards on Twitter on Tuesday.

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Ahead of the latest episode of The Real Housewives of Beverly Hills, during which Glanville is accused of talking behind Richards' back, the mother of two took to Twitter, where she defended her friend against questions regarding her sobriety.

"Is [anyone] going [to] inform Kim that her behavior even once was not ok? If she values her sobriety she wouldn't have taken the pill," a fan message read. In response, Glanville wrote, "NOT COOL to attack Kim when she has so MUCH on her plate."

Kyle Richards Dishes On Failed Friendship With 'RHOBH' Co-Star Brandi Glanville

Since season five of The Real Housewives of Beverly Hills began, Glanville and Richards have been extremely close, but tonight, that could all change.

In a sneak peek at the new episode, Richards is seen speaking with her sister, Kyle, who informs her that Glanville told Lisa Rinna she needed an intervention.

“Guess what else she said to people behind your back Kim?” Kyle asks in the preview clip seen below. “Do you know the stuff she says behind your back? You think your friend is such a loyal, dedicated friend… Brandi Glanville is walking around to people, like Lisa Rinna, and saying, ‘Kim needs an intervention.’ How do you like that?”

For more Brandi Glanville, tune into The Real Housewives of Beverly Hills on Tuesdays at 9 p.m. on Bravo.