Glad to see you hanging in there! This is probably much rougher than getting her back was huh?
I will mention some stuff just in case you need a reminder...
Try your best to ignore or not be driven by what W lacks in the 'sexual' arena... Even IF you are not directly 'punishing' or resenting what you are not getting I assure you it is coming out indirectly... W has done much to be where she is now AND part of why you got to the brink no doubt is rooted in this 'sexual' issue...
REALIZE that more of the same will NOT work -YOU need to come up with something different that YOU can do and that YOU control -- OK!!!
I would suggest a good beginning would be to reward/acknowlege W when she get's it right no matter how small the right is that she does...