I'm glad you decided to share this. Our family went through these same
problems as my Mom got older. Like you, it was my younger sister who did
the most checking in & visiting with her because she lived just a few minutes
away. It can get to be a very sad experience as we notice subtle changes
in behavior.:(
Finally, we had to all have a family meeting & made the decision that Mom should be
introduced to a "assisted living". We found a great place where she had
her own apartment & neighbors to visit when she wanted to be social.