I actually think it makes a difference to elderly people if they have had their own children or not.

I can see why Beverly thinks she has had it with life. If,as assumed, she has no children (grand/great chldren of her own, she doesn't have to factor into account how they will feel if she takes her own life, if they will miss her, if they wish she hadn't done it.

Is there any published stories of elderly people who took the choice alone to go the rational suicide option that do have children, grand-children and great-grandchildren?