is sharing new details about his marriage to the late  – and the drug use that would  that he first saw Houston doing drugs on their wedding day, prior to the ceremony.  The 47-year-old singer recounts the moment to in a  – set to air tonight at 10 p.m..  In his book, Brown writes he broke tradition and peeked in on Houston prior to the ceremony, and was "shocked" to witness Houston "hunched over a bureau snorting a line of coke."  Houston offered Brown a hit, he claims, but he didn't indulge. Brown also writes his bride-to-be said she was indulging in the illegal drug because she was "nervous."  "She wasn't that," an emotional Brown told Roberts. "The drugs wasn't her. She did drugs but drugs didn't do her. She knew how to handle herself. It only made me love and want to protect her more."  A @RobinRoberts EXCLUSIVE: Bobby Brown opens up on an emotional Special Edition of @ABC2020 TUESDAY NIGHT. https://t.co/8Xb03h6C9A  Brown's account refutes previous claims that it was Brown who led Houston to  "It wasn't me who started her," Brown says. "I take my part and I take it hard for me even being a part of it, but we all have our own minds and some of us are stronger than others."  This isn't the first time Brown has made that claim. The singer insisted to Matt Lauer in a 2012  interview that drugs were part of Houston's life "way before" their relationship. He went on to say he didn't get high [on narcotics] before he met Houston. "I smoked weed, I drank the beer, but no, I wasn't the one that got Whitney on drugs at all," he said.  "It's just unexplainable how one could, you know, [claim that I] got her addicted to drugs," Brown continued to Laurer – adding that it pained him to hear fans suggest he was responsible. "I'm not the reason she's gone. It makes me feel terrible. But I know differently. I think if anyone ever knew us, if anybody ever spent time around us instead of time looking through the bubble, they would know how we felt about each other. They would know how happy we were together."  on Feb. 11, 2012, by a member of her personal staff in the bathtub of her suite at the Beverly Hilton hotel in Beverly Hills. She was pronounced dead on the scene thereafter.  Houston's official cause of death was accidental drowning, though the Los Angeles County coroner's office confirmed the 48-year-old singer had cocaine in her system.  of her death included heart disease and cocaine use, an investigation found. The report also found that Houston had marijuana, Xanax, Benadryl and other medication in her system.  Brown and the late Houston were  . In his interview with ABC, Brown tells Roberts he's still deeply in love with Houston.  "For the rest of my life, I will have that feeling towards her because she was the one person that knew me – that one person who had no judgement."  Brown also opens up about his daughter  's drug abuse – which lead to  on July 26, 2015, nearly six months after she was found  in her Roswell, Georgia, home.  "The same thing that happened to my daughter, it happened to Whitney,"  . "The hardest thing I had to do in my life was tell my daughter to let go."  Still, despite Houston and Brown's drug habit, the New Edition alum says they never allowed their daughter to see them doing hard drugs.  "I always made a point to not let her see me or my wife in that type of situation, in that type of feeling," Brown said. "Itâs hard when, you know, youâre doing it every day."
The New Edition singer reveals details of the early days of his late wife's drug use in his new memoir