Ive been in the position of being a neighbour constantly called on for help and company when there was a close relative in residence. The old lady had begun to rely more and more on me for services like form filling, making phone calls, dealing with tradespeople, shopping etc when her son should have been doing a lot more. He had no job and was home all day. As others have said the only way is to gradually withdraw your services so that others have to step up. That might mean making tough decisions not to answer the door or phone and be generally unavailable. Social services will not step in while there are neighbours buzzing around taking up the slack.
Recommendations please, for a stopover on the way to Loch Tay