She needs to detoxify her body. She's now dealing with toxicity from chemotherapy and radiation on top of cancerous cells so now she must heal twice: from the drugs/radiation and the cancer. I would have her start on the Full Body Cleanse; have her drink Detox Tea and Rainforest Tonic tea for starters. The radiation and chemotherapy are harming her. Her diet should be all raw foods and herbs.
Full Body Cleanse
Full Body Cleanse Companion (EBook)