Ben, sorry about your mom. My wife is a non-smoker and got lung cancer, so it is not always caused by smoking. She has bone mets, and especially gets them in the ribs. Bone mets do not always cause pain, but when there is significant pain, it can be treated with radiation. Also, if any of the bone mets threaten bone integrity (where it may cause a fracture or break), radiation can also be used for that. Chemo is usually used for metastatic lung cancer. Chemo and radiation do have side effects, and it varies with the person. Fatigue and nausea are two. As someone here said, you become sick and tired of being sick and tired. The cancer can cause those symptoms too. Let us know how we may support you through this. Don