Before rehab, my mother was able to get out of bed & use a walker and use the bathroom. At rehab they did not push that. They said they could not force her. They sent her home and did not tell me about this only that she needed constant care.
I am now trying to get her a hospital bed, but her legs are so weak now she refuses to try to get up. This was all in about 6 weeks
Good luck with this. You need to look at aging services offered in your area anyway, as you will need help.
Keep checking back for emotional support an tips.
Carol