She is always worried about food not being spoiled or past expiration date. We shop every week. She annoys me when I cook something for myself that she doesn't eat - worrying whether I cooked it long enough to be done. I get so frustrated and angry with her - I know it's over-reacting, but I can't seem to help myself. She has early dementia so that is part of the problem, but really this is the way she's been for years.