I agree with the whole have a plan and a timeframe idea. The time frame can always be adjusted up or down depending on changes in the sitch, including changes in your own tolerance, but yes, you can't let this go on forever.
I am NOT trying to tell you what to do as you know your own sitch and your wife's mental state far better than we do. I think maybe you've done this already, but perhaps it would be wise to discuss an ultimatum with your IC prior to implementation?
Hang in there. It's a long row to hoe and we've all been down it.
The trouble with having an open mind is that people put things in it.
My sitch - Divorce Busted! http://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=1804137#Post1804137