Growing Old

What I don't get about growing old is when to exit. I recently went down to visit my great great aunt. She had lived her life active all of the way. She was still mowing the yard at the age of 84. Unfortunately with all old folks the calcium just doesn't stay where it was supposed to be and she fell over and broke her hip. She was in a nursing home for a while but now she is in the care of her daughter and live in friends. She doesn't walk anymore and care takers don't get her outside all that often. I feel as though she has lived her life and is just waiting for the grace of god to take her.
As a society what do we do? Do we end the suffering or do we try to make her rehab against the odds of rehabilitation? I think that we should look at what is left for her to accomplish in life. Her husband has already passed away. There is nothing that she needs to get done, her daughter is grown, her grandson is grown. I think that I have gotten to the point that I know that her next big act is her exit and I see nothing wrong in that. I hope that she does not suffer and goes to God peacefully. I don't expect her to live forever and I hope that others can share my opinion in this.
I just hope that I am treated the same way for I don't want to linger when I have done all that I can do. I what to exit and go on it what ever is to come. I don't what to suffer and I don't want to plead, just everybody understand that it all comes to an end and everybody must face it so except it.