Today, Debbie says she and Carrie have found happiness. "I admire her strength and survival," she says. "I admire that she is alive. That she has chosen to make it."
Watch Carrie and Debbie discuss their relationship
Still, Debbie says she feels protective of her daughter. "I don't worry about [Carrie]. I just worry about the mental health," Debbie says. "I feel, as a mother does, that I protect her. Who will do that when I'm gone?"
Carrie assures her mom that she's okay. "I enjoy my life. I make choices. I do what I want to do," Carrie says. "I am a strong person. I'm not afraid of almost anything. And that's a lot because of your example."
Watch Carrie and Debbie sing a medley together
Look back at Carrie's life in photos
See which Hollywood treasures Debbie is putting on the auction block