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OTRC: Whitney Houston's sister-in-law Patricia talks to Oprah - See video

Patricia Houston appears in a photo from her interview with Oprah Winfrey in March 2012. (OWN)

Whitney Houston's sister-in-law Patricia Houston is speaking about the legendary singer's death for the first time to Oprah Winfrey.

In an interview set to air on Winfrey's show "Oprah's Next Chapter" on March 11, Patricia Houston is asked by Winfrey if she knew drugs would play a role in Houston's death.

"The handwriting was kind of on the wall," Patricia Houston, who is married to Whitney Houston's brother Gary, said. "I would be kidding myself to say otherwise." A clip from the interview can be seen below.

Houston died at the Beverly Hilton hotel in Beverly Hills, California on Saturday, February 11. Investigators have not revealed what killed Houston, who was found unconscious and underwater in a bathtub by a member of her staff. Her autopsy has been completed but the results will not be released until a toxicology report is produced.

"Things were really changing with her. Very much so," Patricia Houston said. "It wasn't about substance abuse or anything like that relative to the latter -- the latter days or anything like that. I think it was -- it was just more of a lifestyle."

"I saw her chasing a dream, you know, looking for love in all the wrong places," she added.

Winfrey also got an interview with Houston's daughter, Bobbi Kristina, as well as Houston's brother Gary. Prior to the interview, OWN plans to re-air their special, "Remembering Whitney: The Oprah Interview," at 7 p.m. ET/PT. In addition to Oprah's 2009 interview with the singer, Winfrey reflects on her personal memories of the superstar.

The episode of "Oprah's Next Chapter" featuring the interview is set to airs on Sunday, March 11 at 9 p.m. ET/PT on OWN.

See a clip from Patricia Houston's interview with Winfrey below.

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