M mother has been caring for her best friend for quite a while now. Her friend has COPD, as well as some other lung affliction and is on oxygen 24/7. She has been in and out of rehab multiple times because they see her improve, release her, and at home she declines rapidly. When my mother unofficially decided to help her out she didn't know her friend would get so bad. My mother is having trouble financially nowadays and has to work long hours just to pay rent, leaving her friend with no supervision. I don't know how I can help this situation, but my mom needs help. She no longer sleeps and is incredibly stressed because of this and I'm worried about her health. What can we do?