Socialite and celebrity offspring Kimberley Stewart is suffering from liver disease caused by excessive alcohol consumption. Her father, rocker Rod Stewart, told Rolling Stone mag that Kimberley's liver is badly deteorated and that she stopped drinking and smoking three months ago. "She just discovered that she had a very serious liver illness from drinking to much," Stewart told RS. "She said to me, 'Dad, I'm half Scottish - I thought I was allowed to drink a lot.' I said, 'No darling, it doesn't work like that.'" Stewart's son Sean has also battled drug and alcohol problems.