How do you be supportive when your your mother doesn't want to disclose all of the information?

As long as your parents know to just yell out if they need you that's all you can do. Will your mother be having chemo or has she refused it or is it not necessary at the moment?
My parents were supportive during surgery as that's something they knew how to deal with but with chemo and longer treatment its like they really didn't want to know. I was told, we don't want to hear about that, during our Christmas get together so I realised I was pretty much on my own with just hubby and sons.