This is about my mother-in-law and I am only looking for help because no one else (her daughters) seem to be taking any proactive approach. Father-in-law passed away over 15 years ago (she was and still is devastated). The daughters moved her to another state to be near them (I live 8 hours away with my wife, one of the 4 daughters). Since his death and the move she has never resumed her social life and spends her days watching TV or shopping (mostly for things she does not need). She is now 83 and recently was told to stop driving (due to the drugs she is taking).. She is a borderline hoarder.. she is constantly shopping for food and things but does not keep trash.. but ALL her closets are full of plastic store bags full of food and stuff.. I know there is no one solution for this issue but I need to arm myself with information to be able to help my wife deal with the situation. Her sisters (3) all live right next door to the Mom and have seen and dealt with her daily..so they are tired.... but are not brave enough to take control... lovingly.
Another thing to look out for is dementia shopping. A symptom of dementia in many people is compulsive shopping from TV or catalogs. My father was very brilliant up until his death. Still he had symptoms -- didn't want to leave the house, loss of interest in hygiene, shopping from catalogs. He would spend $1-2K some months buying things in catalogs. He never kept track of the money each item cost, though sometimes he would get upset at the size of the credit card bill. He bought junk. He liked the ordering and the opening of the packages. Then he would just set most things aside. We learned at his death that he had significant mixed dementia. It didn't surprise me. If you think she may have dementia or a problem with compulsive shopping, it is good to do what you can to curb the problem. People can spend themselves into a hole if no one is watching out for them.
Good luck dealing with this. I wrestled with the problem my first two years here. I did things like removed catalogs from the mail when I could and not delivering orders to the post office. It was a difficult problem to deal with, particularly since my father was deaf and mostly autistic. (One reason shopping appealed to him is he loved lists. Shopping entertained him like that.)