RHOBH Brandi Glanville, Lisa Vanderpump Twitter fight over ex-husband's affair with Scheana Marie

Real Housewives of Beverly Hills reunion show will show a new rivalry between Brandi Glanville and Lisa Vanderpump.

A preview clip of what to expect at the first part of the reunion episode will be cringe worthy. After a rough season ending between the friends, Glanville tells Vanderpump, "u can manipulate anyone!"

Vanderpump feeds into her comments and fires back, "I've been a very good friend to you." Glanville slams back, "Yes, and you've been a very sh**ty friend at the same time!"

The friendship between the two women may have fallen apart over Glanville's ex-husband, Eddie Cibrian's affair with Vanderpump's SUR employee, Scheana Marie. Glanville tweeted and article slamming Vanderpump for having knowledge of the affair before Glanville revealed the affair to her in 2012.

Lisa tweeted, "I had never heard of Brandi until she had lunch with Cedric, whom she had never heard of. :)"

Vanderpump retaliated tweeting, "grow up please, you're acting like a child." Brandi added, "If I ran three businesses, I don't think I'd have the time to obsess over every little thing on twitter #getalife."

This reunion will be messy!