Why did Bobbi Kristina’s agree to do her first interview with Oprah since Whitney Houston’s death? Some say it was to help Oprah’s struggling ratings on her OWN Network, others say it is for money.

However, according to sources, the REAL reason is because Bobbi Kristina feels that Oprah is “trustworthy.”

Bobbi is telling friends — Oprah “was loyal to my mom, and never did my mother wrong, or made her look bad. She always looked out for my mom.”

As a result, we’re told Bobbi feels Oprah would show her the same respect — not bringing up issues that could potentially show Bobbi in a negative light … i.e. substance abuse.

According to sources close to Bobbi, Oprah was one of the first people who reached out to her after Whitney passed.

So far, it’s unclear if Bobbi is getting paid for the interview — which airs this Sunday.

Source: TMZ