The 44-year-old chat show host said she regularly takes her mother to see doctors, reported Contactmusic.
"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 said.
"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," she added.