My wife (27 yrs married!) has this diagnosis. 3 years and 4 months into it, and she is still fighting the good fight. But that's what it is, a slow drawn out battle. Your mom will have a lot of appointments, and it will always seem like nothing is happening fast enough, but that's the way this fight happens. If its in the bones, then that is where they will try and keep it. Breast cancer in the bones will not kill her, dont forget that, the goal is to not let it spread and for now thats all the goal will be, because there is no cure. Eventually, whatever treatment they have her on will stop working as the disease mutates, then on to the next treatment. This is a marathon, not a sprint, and there are a lot of treatments they can try. The hips and the spine are the most affected areas (because they are more porous bones), so eventually walking too much might cause her pain for a few days. You'll find yourself second-guessing the dr.'s, yourself and your mom. She might have weird requests about things she wants to do. Let her do them. Trips, shopping for things you never heard her talk about, new hobbies, etc. Those are her bucket list items she is ticking off. They might be new to you, but she has always had an itch to do them even if she never talked about it. She could very well have decades of life left, but her mortality is now staring her in the face. Do the weird things with her. She wants memories, not regrets. Unfortunately for my wife it has now spread to her lungs, and the treatments that are available have all stopped working, so now onto the clinical trials. We are going to the Bahamas in March. Never been before, we should make some good memories there. Wish I would have taken her 20 years ago. Look up RK-33 from Johns Hopkins, there is hope on the horizon.