Hey Marcie, so far it sounds like your spouse is able to control her emotions to a degree, and that's a good sign! I hope you can work together with love and find a good place for the both of you. Divorce is not always 100% - she married you for you, and if your body changes, you're still you, you just look different!
Of course, there's the physical attraction part as well. My wife isn't physically attracted to females, and so I'm working on the whole "love" part right now so that when I do come out to her she might decide she loves me enough to stay with me.
So keep working on finding out what works for the both of you. Make sure she knows how important she is to you. Make sure she knows that you care about her well being through out the whole process, and that your transition is HER transition too. In other words, make sure she knows that it's not ALL about you!
Love and best wishes,
Ashley!