I have carefully considered what you have written, along with what mc said in reply. I have decided this:
Telling the kids that the divorce is a unilateral decision is not pointing out a fault of my wife. There will be no finger pointing, no gloating, no chest-thumping. Just statements of fact.
My boys are 14.5 & 11. As members of the family that is being destroyed, they are entitled to know. I therefore, have decided that the right thing to do would be to tell them the truth, regardless of how ugly it is.