The toughest part of this being a Christian is that I believe God already knows the outcome, that He wouldn't put more on us than we can handle, and that it would be His desire for us to R at some point and honor our vows and His bringing us together as one in the first place. I just don't feel any of that right now.
I also think you're failing to account for your wife's FREE WILL in this equation. No, it is not ever God's desire, nor His perfect will for us to divorce. But He DOES give us free will, and He would never force us to be together. As much as His heart may grieve by your wife's actions, it is still nevertheless part of His eternal plan for her to have that choice to make.
And yours to accept it, even as you pray for a different outcome.