Some good some ?

She has been feeling somewhat better. Getting stronger and trying to get around more. She wants to help around the house and do more.I can understand that. I wish she could do more. I keep telling her it's just going to take time. She gets up every morning feeling good for about an hour or so but that's it. She gets physical therapy twice a week and that is helping her get stronger. So physically she is doing better.
Now as far as her memory, that's another thing. Yesterday her physical therapist came and she exercised about an hour. Only a little while after he left she said I guess that nice young man will come by tomorrow he didn't come by today. I said who. She said you know the one who helps me walk. She couldn't even remember him being there or even exercising at all. She also thought my sister was my aunt. My aunt died 15 years ago. I knew to expect her to forget people and things but not this fast. It seems to be getting worse every day. Is this normal?