Kim Richards and Lisa Rinna have been at each other's necks for quite some time now, and it looks like the craziness is heating up.

'RHOBH' Cast Travels To Holland For A Drama-Free Vacation

During Tuesday night's new episode of Real Housewives of Beverly Hills, the ladies traveled to Amsterdam for what they hoped to be a drama-free vacation. Sadly the trip gets off to a rocky start and the tension is definitely thick.

On the plane ride over, Brandi Glanville informed her BFF Richards that Rinna had been talking about her sobriety amongst the group of ladies.

Lisa Rinna Says She's Just Trying To Help Kim Richards

Kim then got very defense and yelled at Rinna after confronting her and they decided to try and ignore each other for the rest of the trip.  

After the ladies attended a charity event, things seemed to be going pretty smoothly, until Richards and her sister Kyle Richards got into an argument after landing at the Holland airport. Kyle accidently left one of her bags on the plane and Kim was upset that she had wait an hour for her sister to get her belongings. 

It's clear the drama is only escalating and based on a sneak peek from next week's episode, the craziness is far from over.

In the video, which can be seen below, Kim and Rinna get into a heated argument at dinner and apparently Kim said something nasty about Rinna's husband, which totally sends her off edge.

The two ladies are in each other's faces and things get a little physical after Rinna throws a glass at Kim. It's unsure how the drama will unfold, but it looks like the two ladies aren't really friends anymore.

Real Housewives of Beverly Hills airs every Tuesday night at 9 p.m. on Bravo. Viewers can watch a sneak peek of the new episode in the video below.