She said: "There's nothing Hollywood about me when it comes to my family. I didn't hire people. I'm very involved with Mom's care. I talk to the doctors, I talk to the nurses, we discuss the findings, we discuss options."
She added to People magazine: "I love that lady. We've gotten so close this year, with everything we've been going through. She takes care of me. And now I can take care of her. I'm really thankful I can be there."
However, the 44-year-old actress hasn't always maintained a strong outlook on life as she previously admitted she was "rocked to the core" when her brother, Lancelot Jr., crashed a motorcycle, which she gave him, and died in 1992.
She said: "I think I got to that place by not being happy with the other side -- hating your body and criticising yourself all the time. When I was around 18, I looked in the mirror and said, 'You're either going to love yourself or hate yourself.' And I decided to love myself. That changed a lot of things."