It is really hard ro know how long she will live. Hopefully, she will stop laying and stop having reproductive problems. Some spend a lot of money with avian vets to get hormone implants or even spaying to stop it. I have had a few hens who suffered with repro diseases and who lived for several years with enlarged lower bellies, doing normal chicken things. Some of those get crop impactions or slow crops that they can die from. I would just give her supportive care, and let her do what she feels like doing. If she is eating well and having normal droppings, that is a good sign.