Drh, it is a very common tale. I can tell you about a dozen I personally know of, and that includes both Hs and Ws.
My only concern now that she has made her bed is that you can move forward, happy and healthy. You may never understand her reasons, because they are not logical, they are emotional. Your logical mind will never make sense of it. You have to accept that and decide that the fact you'll never understand it is ok, and that it isn't a barrier to your going on to live an awesome life.
You got a great settlement that many Lbs s would be envious of, be thankful for that.
Look ahead... Not behind.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018