My late father also had dementia which was not picked up for some time. My parents lived a distance away from the rest of the family, and my mother flatly refused to acknowledge that anything was wrong, even though my husband and I were getting increasingly concerned. Meanwhile he took out loans, cleared out all their files and had, literally, bonfires of all their paperwork. By the time I was "allowed" by my mother to get involved, everything was in a terrible mess, there was no paperwork whatsoever, and it took me months and months to get things sorted out. So my advice to anyone who suspects a family member or friend might have this terrible disease is to be very firm, and get them assessed a.s.a.p. (If they are not agreeable, which often happens, then ring their GP to tell them of your worries - the GP cannot report back to you directly, but making him/her aware of your worries is essential and very useful.) The earlier you can get help and advice the better, for everyone involved and, most of all of course, for the sufferer.
Widows and divorcees - and kindness