"It wasn't an overnight decision, but actually, yes," she told Billy Bush in a two-part interview that begins airing on "Access Hollywood" Tuesday night. "When I found out that I was pregnant, there was just something inside of me that felt a responsibility to mend any issues that I've had with my parents in the past, because listen, I have put them through a lot."
"Of course, you just want to heal any wounds before I become a mother myself," she added.
The 8-months-pregnant celebrity told Bush that she does know her biological mother. But, there have been reports that she doesn't maintain contact with either one of her biological parents.
Richie said that her adoptive father, Lionel Richie, is excited about the baby, but doesn't want to be called "grandpa."
So far Richie and her boyfriend, Good Charlotte's Joel Madden, don't know whether they are having a boy or a girl. She admits that she's curious, but Madden has been with her for every doctor's visit so she hasn't been able to ask on her own. "I'm nosy," she said.
The couple have been dating since December 2006, but have no immediate plans to get married.
"Well, look how much has happened this year," she said. "I got to hold something for when I get older, I can't have everything happen all in one year."