R&B pioneer Bobby Brown's sister fears for his wife Whitney Houston, telling a British newspaper the singer's life is in danger through her alleged addiction of crack cocaine. Self-confessed former addict Tina Brown tells The Sun newspaper that Houston has failed to beat her drug demons, despite a court-ordered visit to an Antiguan rehabilitation clinic in April 2005. Tina alleges Houston is living in sordid conditions and regularly spends days away from her Atlanta, Georgia home, where she lives with her husband Brown and daughter Bobbi Kristina. Tina says: "The truth needs to come out. Whitney won't stay off the drugs. It's every single day. It's so ugly. Everyone is so scared she's going to overdose." The mother-of-six claims Houston's alleged drug use has made her paranoid that Brown will cheat on her. Tina continues: "She'll point to the floor and say, 'See that demon. I'm telling you somebody's messing with my Bobby.' She always thinks it's something to do with Bobby. But it's her, hitting herself. "I understand what she's going through. Addiction is a disease. Maybe this interview will save her life."