Sorry your mother is going through this. 

When it comes to chemo I think it depends on the individual and her/his siutation. I know what I might possibly do for me but that doesn't mean it would be the right thing for your mother.

I would suggest talking to doctors,  and survivors and researching as quickly as possible, including  healthy healing foods and support systems. I hope that helps a little.

Your mother is in my prayers. Many blessings.