Kim,
I am on my second wife. The first one could not accept what I am. She knew for most of our marriage, I compromised most of our marriage, but in the end, I am what I am.
Compromises that seem like you will be able to keep now, can turn into resentments and feelings of an unfulfilled life, that you may end up blaming on your SO. Ask most transsexuals about anger? They know all about it. You may keep your promises, but in 15 years wake up one day and say to yourself, "I am a girl, why do I continue to pretend I am a man?". You will no longer care about the promises or the compromises. You will be of one mind. To become the woman you always knew you were. It can and does end relationships.
My new wife of just over a year now, has alway known me as Elizabeth. She totally accepts and understands that I am a girl. She says I am attractive to her either way. We have sex, but we don't always use my male parts. When we do, it is enjoyable, but mostly because of the intimacy. I feel just as fulfilled if we don't use my male parts. My wife is very open minded and does not have a problem the fact that I dress as a girl 24/7. She calls me her "big girl" as I am 5' 10" and she is 5' 1".
She wants to have children with me, but she also knows that my road leads to transition, if and when I can make that happen. I made it clear up front that I would not stop my transition if she failed to get prenant before the opportunity presents itself, should that occur. Right now, it appears she really does not have a time pressure.
All in all, our marriage works great. We both understand who we are and who we are married to and we both understand each others intentions. Niether of us works, so we spend almost all of our time together and we really enjoy it. I have a wife, a lover, a best friend and a girl friend to shop with. I feel really lucky and I am just enjoying each day as it comes.
Love always,
Elizabeth