Kim Richards and Lisa Rinna just can't seem to set their differences aside.

During a sneak peek at tonight's finale episode of The Real Housewives of Beverly Hills, Richards is seen telling Rinna that the season 5 reunion "was not a very good time" before the two women begin feuding, yet again, about Richards' ongoing sobriety struggles.

After Richards confronts Rinna about her comment about being "enraged" to see Yolanda Foster skip dinner with her and her co-stars in lieu of lunch with Richards and Brandi Glanville, Rinna replies, via Us Weekly, "Kim, it's your choice to live your life the way you live your life ... I want you to get better."

"I am better. I felt like that's a dart, like you just threw a dart at me, honestly," Richards claims.

According to a report by Radar Online in March, Richards and Rinna's issues with one another continued to play out during the three-part Real Housewives of Beverly Hills reunion, which begins airing later this month.

Richards “lit into Lisa Rinna about comments she had made in the past…and took exception to statements made that Lisa was scared of Kim. It was clear that Kim was hoping to get a reaction from Lisa,” the source revealed.

However, rather than engaged, Rinna reportedly shot Richards' drama down.

“Lisa took the high road and refused to let Kim get the reaction she was clearly hoping for. Lisa apologized to Kim for any pain she caused her, which was the last thing she was expecting,” the insider said.

Also during the reunion, Foster, who went through a divorce during filming, stormed off set after facing tough questions from her co-stars.

“Yolanda was getting very defensive, and started crying, as if that might stop the barrage of questions,” the source stated. “It didn’t, and it ended with Yolanda storming off the set.”

For more of the drama between Kim Richards and Lisa Rinna, tune into The Real Housewives of Beverly Hills season six finale on Tuesday, April 12, at 9 p.m. on Bravo, and check out the sneak peek at the new episode below.