Stop making so many assumptions, Frank! You will drive yourself crazy. You have no idea what your wife is saying/not saying. I don't get how you are so sure your wife is showing "happy" to the outside world. You seem to believe that she made this decision and now has the weight of the world off of her. With the scarcity of deep communication between the two of you I just think that you are assuming too much.
Oh, and I totally believe that you were never abusive and that you never put your kids in danger. I was trying to post as if it were to someone new, and those are things I would have really said. I hope someone else gives that post a shot, too. You are so wrapped up in one way of thought that it would be nice for you to see other perspectives.
You get some sleep tonight, o.k? You need to take care of yourself before you can take care of anything else.