How do I get my grandmother to stop being scammed by psychics?

I'm 40 years and take care of my grandma who I have lived with for the past 20 or so years. I feed her, bathe her and so on. She is giving her money away to psychics and she thinks she's going to hit the big money with these thieves that are telling her this just so she sends money - alot of money - every month. What am I to do as she thinks I'm against her and out to take her money?