Adult CP & Delusions / Paranoia

I have a family member who is 29 years old with CP. She has been recently been diagnosed with delusions and paranoia and the doctor is providing no hope at all. I have been told that CP will progressively get worse as she ages and not to expect any improvement. I understood that her CP would progress with age. But the doctor is leading me to believe that her mental issues will also progressively get worse with age.

Does anyone have any insight or experience with this type of situation?