Tell mom she can't cure it with diet and prayer and that you would really like her to stick around a while longer. She can use her diet and prayer to speed her healing and make her strong again. I can see not doing the radiation and chemo at her age, since she might not be around long enough for a recurrence, but the surgery may well save her life. Good luck.
Well, we all know that breast cancer can't be cured even with most of modern medicine, let alone diet, etc. I certainly DO NOT agree with your Mom's decision BUT we all have the right to decide what treatment we are going to take or not take. I'm hoping she will somehow be convinced to have the surgery but I do see the sense in no chemo, etc. at her age. Still I will defend her right to say NO to all of it.