Standing for one's M is seen from every one's one personal POV. In many ways, I have admiration for those who can do it. However, I know me....and if my H wanted a D from me, there is no way I'd try to hold him. Guess that doesn't sound very DBish, but I don't want to force anyone into a R with me who doesn't want it....especially one as intimate as M.
Sometimes, it takes going through the D process for one to finally realize what it is they truly want.
You have to make the decision to set her free and see if she will return, or fight the D. What will leave her with better feelings toward you? Would you damage it more by fighting the D or giving it to her? Would there be a chance to meet up some day and have a brand new R with her?
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!