Whitney Houston's brother has revealed he introduced her to drugs. Michael Houston has admitted he started experimenting with cocaine and crack cocaine in the 80s and his younger sister followed his lead. During an intense appearance on 'Oprah's Next Chapter' with his mother Cissy, Michael was quizzed by Oprah Winfrey about his and Whitney's substance abuse. Quoting a passage from Cissy's tell-all book 'Remembering Whitney', Oprah enquired: 'Your mother writes in her book that you were doing drugs with your sister. You mother writes, 'I was shocked and confused, I didn't understand it then and I still don't.' How does it feel to hear your mother say that?' Michael replied: 'It's painful, I feel responsible...