I really feel for you Troub, and for all of your family. That is the worst, that you know that things will not improve at all. I hope that your family and the people closest to your grandparents will all be able to support each other and your grandparents in whatever they need.
And of course I will keep them (and all of you) in my thoughts and prayers. I really hope that things stabilise with your grandparents and that they continue to enjoy the best quality of life that they can for a long time.