Bobbi Kristina Brown has said she agreed to give the first interview since her mother's death to Oprah Winfrey, but some of her immediate family members may have a problem with that, as they reportedly believe Whitney Houston's daughter isn't ready to speak just yet.

Bobbi Kristina, 19, has reportedly said she agreed to a one-on-one with Oprah because she trusts the talk show host.

[Oprah] was loyal to my mom, and never did my mother wrong, or made her look bad, Bobbi Kristina told her friends, as reported by TMZ. She always looked out for my mom.

Houston's daughter's interview with Oprah airs Sunday, but reported that a family friend said that the family may have a problem with it. They think it may be too soon.

There is still no resolution and there has been nothing concrete on the cause of [Whitney's] death, and they were hoping for that, the family friend told There were members of the family who weren't keen on [the interview] going down at this time.

Some of Houston's close relatives reportedly wanted Bobbi Kristina to hold the interview for a while, as they think Bobbi Kristina needs some time.

She's so very young and impressionable, the source told People. She has to start finding herself as a woman on her own as opposed to defining herself as Whitney's daughter and Whitney's support. It's kind of interesting to see what's going to happen to her from here on in.

Bobbi Kristina turned 19 last Sunday. Her mother died at the Beverly Hilton hotel on Feb. 11 and the cause of death is not yet known. Officials are awaiting toxicology results to determine what killed the singer.