I'm sorry if this is not at all helpful, but it really seems to me that your predicament has more to do with your wife than you. You present a very solid dilemma - you are transgender. You could have told her that you are a long-term gambling addict, into beastiality, get off on popping balloons or any number of other things, and you would still be a man. I guess by her logic any of those might be more bearable.
This issue becomes one of your wife's willingness to identify and confront her own fears. What is her true issue? Fear of being labeled homosexual? Fear of being embarrassed in front of (obviously very shallow) friends and family? Fear of you becoming prettier than her?
Are her fears more important to her than your ultimate happiness even if you are completely devoted to her? Has she (or you, for that matter) contemplated a future with you moping around the house angry and depressed because you can't be YOU?
I bring this to you based on my own experience. I was with a beautiful woman whom I adored, the one who I sprung my big discovery on....fortunately for me, she was big enough to confront her fears. We had an agreement at first - she was NOT lesbian!! As time has passed, and after a handful of visits to a gender-specializing therapist, and after much study on the topic of transgender people and couples, she has come to realize that she is truly happy with me as a woman. Frankly she is admitting that she isn't sure that she could ever love a man the way she once thought she did.
I don't suggest you pull the pin and march off one way or the other. But I do think that therapy that extends beyond your gender status is necessary. Have you both identified what are absolute red lights to your marriage?? Did you know that you and your wife even had red lights??
Good luck - I can personally attest to the fact that it is 100% possible to live in a beautiful, loving relationship with someone after a gender transition. I was eventually married, as a woman, to my beautiful bride in a wedding that was very well attended by close friends and family who love us and support us still.
Mia