MK - I was going to say unequivocally "no", don't move until I read this:
Originally Posted By: mykarma
But then again i feel this urge to make this one final sacrifice on behalf of my relationship.
How strong is this urge?
You have to decide what's right for YOU. If you can make the move without losing your self respect, maybe you could consider it. But there's a lot of questions. Would there any committment whatsoever from your W to work on the M? What if you moved back and she still showed zero interest in working on the M? Does your W even want you to move? Or is just your MIL? If it were me, I think there would need to be a long, long talk with your W and some strong committment to work on the M before I would even consider it. Just MVHO.