Her Son, before I began rad/chemo, I ate like a linebacker, and gained as much weight as I could. This was a silver lining to the treatment cloud as I enjoyed cheesecake with no guilt. Also, for the first two weeks of treatment, I kept eating as much as I could while my taste still worked and before the mouth sores appeared. As I ended up losing all that and more by the end, I am glad I did that. I did not experience weakness, as much as fatigue toward the end of tx. Take your mom out for breakfast, lunch, and dinner!