"Real Housewives of Beverly Hills' returns in January 2015. And if new reports are true, it seems that the cast have become meaner to one another.

A recent report claim that the housewives are ganging up on fellow cast member Kim Richards. The reason? They think she has a drinking or drug problem.

An insider told Radar Online, "Things got extremely tense very quickly in Amsterdam because the ladies, led by newcomer Eileen Davidson, believed that Kim was under the influence of something."

"No one saw Kim drink or take any pills, but she did slightly slur her words during one of the initial outings on the trip," the source added.

If fans can remember, this wasn't the first time Kim was suspected of being under the influence. In season 3, Kim acted weird and slurred her speech during the cast's trip to Paris.

Meanwhile, other "Real Housewives of Beverly Hills" news speculate that Eileen and Yolanda are behind the scheme.

"Eileen was trying to stir things up behind the scenes, along with Yolanda [Foster], questioning Kim's sobriety," a source said.

Another "Real Housewives of Beverly Hills" rumor has it that Eileen would also often disregard Kim's presence during filming in her utter dislike for the housewife.

"Whenever Kim and Eileen film together, there is always a lot of eye rolling on the part of the soap star. Eileen complains that Kim is a total airhead and doesn't understand why she is even on the show. In Eileen's opinion, Kim is a total bore, and just rides on her sister, Kyle's coattails."

But Kim's family friend came to her defense and said that she is "committed to her sobriety."

Inquistr reported, "A separate source says Eileen 'didn't make any effort to try to get to know Kim at all' and that she 'can come off as very snobbish and aloof.'

Stay tuned for more "Real Housewives of Beverly Hills" updates here!