boy, this is tough. I told my H that I wouldnt even discuss D while the OW was still in the picture. I guess I would say that you should stick to your guns. This is your marriage too, and she isnt the only person to get a say in what happens to it.
What happens if you just dont participate? Can she go forward at all without your consent? After 6 months or a year?
Bottom line, as far as I am concerned, you shouldn't put yourself through any more hell for something that you dont want. Yeah she might flip.
Does anyone else think that this is a place for a LRT? If you arent ready to go to the last resort then I think that the answer is no, but maybe you should start reading up on it just in case it does come to that.
I guess I gave the wrong finger to the wrong man...