Is a feud brewing between Real Housewives of Beverly Hills sisters Kim and Kyle Richards?

Brandi Glanville To Be Set Up On A Date During 'Steve Harvey Show?'

Radar Online reported Wednesday that Kim and Kyle got into a huge fight at Adrienne Maloof's house.

Maloof was apparently hosting a party for Never Hungover, a supplement company her family owns, when Kim and Kyle got into a fight with yelling, screaming and tears.

Kyle Richards Reveals Season 5 'Best Season Ever' With New Ladies

"Kim and Kyle had already been openly feuding over allegations that she had fallen off the wagon," a source told the website. Kim has been sober since last season of the reality show.

"Kyle just doesn't believe that Kim is indeed sober," said the source. "After the cast trip to Amsterdam, Kyle became even more convinced that Kim has suffered a setback in her battle with alcohol."

Kim, meanwhile, says she is completely sober. She reportedly thinks Real Housewives is just "exploiting her sobriety."

"There was tons of yelling, screaming, and plenty of tears," the source continued about Kim and Kyle. "It was so tacky to see these grown women behaving like this in public!"

Although the sisters are said to be in a "dark" place, Kyle recently said how great and intense Season 5 of the show was.

Kyle recently told Us Weekly that the new season of RHOBH is "going to be the most intense season we've ever had," she said. "In every aspect honestly. I mean, from the relationships, to disagreements, problems, you name it. It's the most intense season we've ever had."

Tags: real housewives of beverly hills Bravo