The only thing the producers of The Real Housewives of Beverly Hills need to do is let the cameras keep rolling because the drama is at an all-time high with a shocking confrontation leading one of the cast members to the verge of quitting.

During filming for season four of The Real Housewives of Beverly Hills last week, Lisa Vanderpump and Brandi Glanville confronted Kyle Richards about allegations that Mauricio Umansky has been cheating on her, Breaking Celebrity News has learned exclusively.

The situation became so heated and intense that Kyle wanted to quit the show!

Although hunky Mauricio has previously denied womanizing, Lisa and Brandi decided "to confront Kyle about it on camera," a source told Breaking Celebrity News.

"They absolutely blindsided her, and were relentless.

"Brandi maintained she had solid information to prove that Mauricio has been cheating on Kyle. Kyle became extremely upset, and refused to listen to the girls. She felt especially betrayed by Lisa because they had once been so close."

The interaction was brutal and when it was over the hit show almost lost Kyle.

Kyle was "so upset and disgusted after the confrontation, that she called producers of the show, and told them she wanted out," the source said. "

Producers were able to talk her out of it, but Kyle is extremely unhappy with how season four is unfolding."