I don’t understand what you mean by “we are sleepers.” I do see a lot of people that divorce soon after the kids are grown. Was it menopause? Lots of women go bananas then.
Uh oh, better get out your asbestos suit... Actually I know a family that that indeed happened. She went bat$hit crazy.
I have heard of the excuse of empty-nesters divorcing because they stayed together for the kids and when the kids left home, there was no longer a reason to stay together.
We quietly live our lives but are always aware of stuff like this:
http://www.billstclair.com/lodge/Books101.shtml