She just turned 78, and both she and the BIL have been suffering from Dementia for the past 3 or 4 years. Neither have any idea of what's going on, and Sis has refused to eat, etc., for the past few weeks....loosing weight rapidly, and totally incoherent.
The big mystery, for everyone, is What caused both of them to decline. They, mostly He, refused to go to the doctors when everyone first noted their symptoms. They did agree to a house inspection, in case there was any "environmental" issues...asbestos, etc.....which showed nothing. Now, its too late. Only an autopsy might give us any clues. I suspect they ate something....perhaps Sushi, which was contaminated with a parasite that attacked their brains.