This week on "The Real Housewives of Beverly Hills," Kyle Richards, Lisa Rinna, Erika Girardi and Eileen Davidson went to the Hamptons to celebrate Lisa Vanderpump's Bella magazine cover, and talk turned to Kim Richards, who had just been arrested for shoplifting $600 worth of toys from Target.

Before their trip, Vanderpump called Kyle to know about what happened, but Kyle was very emotional and could hardly speak. Kyle told her that her sister wasn't "of sound mind" and that she didn't want to talk about it. Later, she told cameras that she learned about the incident on TMZ, and that right now, her sister was a "very sensitive topic" and that no one seemed to care.

On her Bravo blog, Kyle said that when Vanderpump called her about Kim, she was on vacation in Idaho with her husband and children. She explained that she just heard about the news and wasn't ready to talk to her friend about it.

"I was still processing what had happened and thinking about how it would impact Kim and our family," Kyle wrote, adding that what was making it even difficult for her was the fact that she and her sister were not in speaking terms at that time.

2015 was certainly a rough year for Kim as she was arrested in April for public intoxication and battery of an officer, and shortly after that the former child star went to rehab to seek help and work on her sobriety. Shortly after she got out of rehab, the star was arrested once again in August for shoplifting at a Target store in Van Nuys.

Nowadays, Kim is said to be doing better and while she isn't part of this season's main cast, the 51-year-old will be appearing in future episodes and it is expected that she will take part on the season 6 reunion show.

Next week, the ladies' trip to the Hamptons gets even more fun when New York Housewife Bethenny Frankel welcomes them to her home for lunch. But tensions rise when the Skinnygirl mogul clashes with Erika.

Last month, Erika told People magazine that during her confrontation with Bethenny, the "RHONY" star wasn't afraid to speak her mind.

"Bethenny, in true Bethenny fashion, kind of let me have it," said Erika. "She has her opinion and she definitely says what she thinks."

"The Real Housewives of Beverly Hills" airs Tuesdays at 9/8c on Bravo.