The feud between Lisa Rinna and Kim Richards will continue in episode 16 of "Real Housewives of Beverly Hills." (From left to right: Kim Richards, Brandi Glanville, Eileen Davidson, Lisa Vanderpump, Yolanda Foster, Lisa Rinna and Kyle Richards.) Bravo

Things are heating up in the feud between “Real Housewives Of Beverly Hills” newcomer Lisa Rinna and the hit series’ seasoned veteran Kim Richards.

The pair first faced off after Richards, who famously documented her struggle with addiction for Bravo’s cameras, began exhibiting some concerning behavior at a poker match hosted by fellow Housewife, Eileen Davidson. After witnessing firsthand how destructive addiction can be, Rinna decides to voice her feelings to the rest of the group. Unfortunately her message was not well received by all.

Tensions came to a head as the group prepared to jet off to Calgary for an event hosted by Yolanda Foster's husband's philanthropy, the David Foster Foundation. The two exchanged words before take off, but it seemed they may be able to leave their differences in the Hills. Unfortunately, new footage from this week's upcoming episode suggests otherwise.

Though the ladies were able to enjoy a lovely evening to benefit a great cause, it appears the sobriety-drama reared it's ugly head again upon landing in Amsterdam. Clips released by Bravo show the aftermath of Richards threatening to reveal a secret about Rinna's husband, actor Harry Hamlin. Controversial cast member Brandi Glanville, who has come to Richards' defense many times throughout this fight, can be heard discussing the evening's events in detail while standing outside the restaurant alongside Kim and Yolanda.

"Lisa should not have stood up or thrown her glass or tried to joke her," she says. "These women just don't know how to drop something when you ask them to drop it. So it sent Kim into a rage and I get it."

In the meantime Kyle, Eileen and Lisa Vanderpump head back to the hotel with Rinna where she contemplates going home early.

This footage comes just after Rinna's revelation that being cast on the show nearly ended her 18 year marriage.

"I went to Harry and said I'm thinking about doing 'RHOBH' and he looked at me and said, 'If you do this show, I'll divorce you,'" she said last month during an appearance on "Live With Kelly And Michael."

Fortunately for her, Hamlin came to his senses before the deal was finalized.

"I walked away and was done with it. Actually, I was done with the show idea," she added. "And he comes to me a day later and goes - and you've met him, he's very mellow, very low key - and he said, 'I've thought about this and I think it'll be a good idea if you do it.' He went through it. And It was like, 'OK.' And there you are!"

Be sure to catch the latest episode of "Real Housewives of Beverly Hills" Tuesday at 9 pm!