<slap> Dude, snap out of it already. You feel like you have no control over this situation BECAUSE YOU HAVE NO CONTROL OF THIS SITUATION!!!!! You need to learn to accept the things you cannot change in life and you will be much happier. Worrying about something you have no control over is just a waste of time and effort. Do you worry that a plane is going to crash into your house right now? It could, you know. But you don't worry about it because you realize you have no control over whether that happens or not. Trust me and the others on this board when they tell you that you have about as much control over what your wife does (having an A, filing for a D, etc.) as you do over a plane crashing into your house.
I'm not ordinarily a preachy person at all, but if you are at all religious you should pray to your God that He help you do the things you can do to the best of your ability, urge the Holy Spirirt to work through your wife, and give the rest of this situation over to Him per His will. That is the only way you'll get through this with your sanity! Good luck, brother.