What Keeps People Here???

Ok the last five months I have been wondering this..what keeps people here while others go. Petey my great-aunt has been suffering for a while now and is gettingh worst..then better then worst again. As I am sure you all know Grandma Happy died first...she was the closest to pete. Then thier oldest sister Dot died next....Pete lost her husband of 67 years two years ago but the lost of grandma happy has been the hardest on her. Petey wanted to be the first to go ...and the way it looks she might be the last. She can barley walk she falls she can't do for herself..what's the point of living? I know everything happens for a reason and we aren't suppose to know everything...But what do we do watching them go through this??