The 43-year-old rapper is planning to reveal the details of his life with the late singer in a book about Whitney in a follow up to the 2008 tome, 'Bobby Brown: The Truth, the Whole Truth and Nothing But', written after their divorce in 2007 which contained secrets about their relationship.
A gagging clause meant he could not say everything he wanted to in the first tome, but insiders now believe he is going to ''cleanse himself of all responsibility'' over the 'I Will Always Love You' hitmaker's drug use in his forthcoming release following her death last month.
A source told the Daily Star newspaper: ''Bobby knows people will buy the book, whatever it says. And unlike last time, Whitney is not here to defend herself.
''He's free to say whatever he wants and will undoubtedly paint himself as a grieving saint.''
He has previously claimed: ''I never used cocaine until after I met Whitney. She used code words when ordering drugs like 'boy' for heroin and 'girl' for cocaine.
''I was using everything I could get my hands on, from cocaine to heroin.''
He is quoted as saying: ''By the time I brought out my third single I was one of the biggest stars in the world.
''Madonna used to open up shows for New Edition in New York.
''Running into her and getting to know her better at the height of my success was like a reunion.''
Whitney confessed to using ''rock cocaine'' and marijuana during a tell-all interview with Oprah Winfrey in 2009, it is believed her shock death at the age of 48 was caused by a lethal combination of alcohol and prescription drugs.
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