Kim Richards: Rehab After 'RHOBH' Fight (VIDEO)
As the two argued in a limo, Kyle tore into Kim about her alleged alcoholism, yelling: "You are a liar ... you are an alcoholic! Yeah, that's right. I've said it now and everybody knows."
The heated exchange came after weeks of tension on the show between the two, who are half-sisters with Kathy Hilton. By the end of the show, her family had checked her into rehab for treatment, which Kim left a week later.
Watch the video below: