In this week's Season 4 premiere of Real Housewives of Beverly Hills, Kyle Richards and Lisa Vanderpump have differing opinions on whether Yolanda Foster would tell a lie.

As seen in a preview video clip, Brandi Glanville asks Yolanda if she's going to Kyle's upcoming party to celebrate the 100th anniversary of Beverly Hills.

"I saw the invitation, but I'm confused," Yolanda tells her. "Why would I go to somebody's house that just called me a liar? I do not lie."

It appears that Yolanda and Kyle are still at odds over whether Yolanda insulted Lisa behind her back, as Kyle says she did. At last season's reunion, Yolanda denied having said the insult.

"I just need acknowledgement in order to move on, and Kyle seems to live her life by sweeping everything under the carpet," Yolanda says in the video clip.

"I'm expecting a phone call for her," Yolanda adds to Brandi. "Would you send somebody an invitation and not call and say, 'Hey, can we move beyond this'?"

Meanwhile, Lisa tells Kyle that she believes Yolanda's side of the story. "When I look at Yolanda, [never] would I associate her with being a liar," Lisa says.

"I do, because I know, and she knows," Kyle responds. "I know the truth, Kim [Richards] knows it, and Yolanda knows the truth."

Wow! It's only the first episode, and we're already getting tons of drama.

Source: Bravo