Whitney's sister-in-law says 'handwriting was on the wall' about her death

Whitney Houston's sister-in-law Patricia told Oprah Winfrey in an interview that the "handwriting was kind of on the wall" that drugs would kill the singer. The 'Bodyguard' star's daughter Bobbi Kristina will speak publicly for the first time about her mother's death in the OWN Network special interview to be aired on Sunday night. The singer's brother Gary Houston will also appear. Patricia Houston, who was Whitney Houston's manager too, discussed her sister-in-law's ongoing troubles in a clip released Thursday, the New York Daily News reported. "Did you think that drugs would end up taking her? Did you think that?" Winfrey is seen asking her. "The handwriting was kind of on the wall... I would be kidding myself to say otherwise," Patricia said. Whitney Houston was found dead on February 11, one night before the Grammy Awards. The exact cause of death has yet to be determined, but the six-time Grammy winner had a long history of alcohol and drug abuse. Patricia Houston also said she was alarmed by some of her sister-in-law's other lifestyle choices. Winfrey goes on to ask her if she was "afraid of that day, February 11, showing up in her life?" "If things hadn't changed. But things had, were, changing. "Things were really changing with her. Very much so. ... I was afraid for other things," Patricia replied.