Lisa Vanderpump Is Unsure if She'll Return to 'The Real Housewives of Beverly Hills'

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

With the news that Kim Richards is not returning for the next season of The Real Housewives of Beverly Hills, is her fellow original cast member Lisa Vanderpump also out?

ET caught up with the 54-year-old reality star Thursday night at her restaurant Pump in West Hollywood, Calif. -- where she was hosting a book party for Real Housewives of Miami star Lea Black -- and she was coy about her future on the Bravo hit.

"You know what, that's the million-dollar question isn't it?" she told ET. "I don't know. I mean, I've done five years and it's been an incredible time. It's up to Bravo."

WATCH: Jennifer Lawrence and Her Gal Pals Recreate 'Vanderpump Rules' Intro

The RHOBH star already has a successful Bravo spin-off reality series, Vanderpump Rules, based on her Los Angeles restaurant Sur. But she revealed that she and her fellow cast members are currently still in negotiations.

"Everybody's talking, doing negotiations. So, we'll see," she said. "I'm busy doing Vanderpump Rules, and I'm running my businesses, and doing my charities. But it's always been an amazing experience."

As for her thoughts on Kim Richards, who's back in rehab for the fourth time after being arrested at the Beverly Hills Hotel for public intoxication, Vanderpump said she hasn't talked to her recently.

"I know she's been going through a lot, you know, and I just hope she gets help," she commented. "She needs it."

She did admit that Richards' absence from the show will definitely be felt. "Of course. When the dynamic changes, it always affects the show but nothing has been decided about anybody that's going back," she stressed. "Me included, you know?"

Bravo has not commented on any official casting decisions for next season of RHOBH.

WATCH: Chris Pine Caught Kissing 'Vanderpump Rules' Star Vail Bloom!

Check out the video below for more on Richards' absence from the Bravo show.

Related Gallery