My wife and I are in the situation now where our parents are older and not super healthy. I realize they will one day pass away and I will miss them but I do what I can now to see and speak with them regularly; even my in-laws. My wife shows no fear that they will die because the big A is coming and they will all live through it. She is completely unprepared for the death of her parents. When it happens, and it eventually will, I don't know if it will drag her deeper into the cult or maybe wake her up. The same goes for when she finally comes face to face with her own mortality as we age and get closer to a natural ending.
I really try to enjoy my life now and show my appreciation for those around me.