Mom can no longer bear weight. What can I do?

Hospice should be able to help you with this problem. She just may become bedridden.

Question asked before

https://www.agingcare.com/questions/mobility-and-toileting-any-advice-449721.htm

You may have to give up your livingroom for her to have the space to be lifted, you can use incontinence products or you can request a catheter.

Have you talked to your hospice representative? They know how to get around these issues.