Interesting dilemmas for we who are, and want to stay, married to cisgender partners. My darling spouse helped me to realize I needed to deal with it in the first place and was totally supportive to begin with. That is not sustainable for most people as the reality vs the hypothetical possibilities is really unknown. Transition comes with no guarantees for the outcome and the costs. It takes a great deal of effort and honesty. I love not having to hide who I really am but I am also somewhat obsessive about transition and have learned to not go trans talk 24/7. She needs breaks and it is healthy for us to maintain our full life of interests IMO.
As my transition has progressed I developed significantly greater confidence and more independence in many respects. Initially it can be surprising even shocking for our spouses and some are just not going to tolerate, much less accept us, as a woman. Heck, I shock myself sometimes with the woman I have become. Me with lipstick? As Jim I did not kiss anyone wearing the stuff!
I thought since both of us are bisexual and she has known about my crossdressing and more for years that it would be easier. Her orientation does not, however, mean I would be just her kind of girl and in fact, i'm not. She married a guy she was attracted to and he's gone. She is transitioning too. Our connections are deep and after 40+ years we are still married and mostly happy with each other. I doubt she will ever be able to see me as "just a woman" and why should she? Can we really expect our wives to forget the person they loved enough to marry and lived with as a man for years?
I found it very easy to let my male persona go. What a huge relief. What freedom.
Our wives, in contrast, may grieve terribly for the loss of someone (or at least the image) they loved. If we are fortunate they may be willing to learn to love the person we become. It takes time to adjust and I am grateful we have made it this far. I would like to think we will remain together and work out the curves that come with life.
The past is gone, the future a dream, we have this one day to make a difference. Love long and well.