My Grandma is living in an assisted living place, where whe has her own rooms but the home provide lunch and dinner for them. In general she is very happy there. However, over the last year or so she has become convinced that people are stealing from her. The types of things that she thinks have been stolen are: jewellery, a jacket, pants, coathangers, pantyliners, nail files, sausages, etc. There have been lots more that I can't remember. Mostly things no-one would ever steal - who would want an old lady's pants?! My parents go down to see her every few weeks and almost always end up finding the thing that has been stolen. One time (when the pants were missing) they found about 20 pairs of pants in a case in the bottom of her wardrobe - she'd clearly been hiding them there.
In the previous place she lived she was convinced it was the cleaner stealing from her - it all got quite unpleasant. We're not quite sure who she thinks is stealing from her now as she seems to like her cleaners here.
Anyway - what can we do about this? We're pretty sure it's the beginning of dementia - she is in her 90s. Should we sit her down and tell her we think this? She won't like hearing it! Or just keep trying to reassure her each time she loses something? Has anyone else had any similar experiences?