Little sister, I believe Amy is right about the language they are using is to get ready for his passing. Tell relatives friends last visits, financial, funeral ect. You will want to make sure bank accounts are joint and no payments come from a him only account as those can be frozen for 6 months. You will need multi copies of death certificates for banking, insurance, government, pensions ect.
Also get prepped for funeral home, they sell on emotion have a second person there is a good thing as some are very predatory. I have all details of mine done already to make it a no choice for others as its already a tough time, plus the entertainment value of my last gathering should be remembered in a way that is uniquely me.