The guy from history "Same, fool, blame", you are a great guy! And that without any irony. I took care of a very elderly mother-in-law (fortunately able to move around the apartment), I understand how difficult it is. The main thing here is not physical care, but attention. I came to her 3-4 times a week (to prepare, buy, help with laundry and cleaning), I spoke on the phone every day. When I had a week's break in nursing (daughter and baby just got out of the nursery), it just started - the grandmother went down (to the bedroom), lost all the skills of steadfastness... A month I danced around her, had fun, pulled to the previous level, and understood why I do all this - walking grandmother is much better than lying! As long as she walks, she lives. You should try something to captivate her (crosswords, series, flowers on the window or in the garden, walking or talking on the phone with friends). Good luck to you!