My wife had a senior mother, much like my own, however her mother has not taken good care of herself. While my mom will walk every day from home to church, her mom will walk as little as possible. This makes for a very long visit when she comes over because I spend a lot of time rehabilitating her.
In the end it is all about taking care of family. I am lucky enough to have married into a family where every one gets along, but I know there are those who didn't. One of the comments my dad made was that eventually all you have is family, and that is why I am glad that we have a good family bond.