Welcome, Nikki!
If you want to know what's really going on in your wife's mind about all this, well, then ask her! Being transgendered is a phenomenon that can kill marriages and other relationships unless honest and open minded communication is relentlessly pursued.
Perhaps, if you feel uncomfortable talking about it with her one on one, you can try to find a therapist who specializes in treating people with gender issues and with his or her help you'll be able to disuss these things more openly. My wife and I have been attending sessions together and it has helped both of us in understanding what the other is going through. The therapist gives us good suggestions on how to deal with the problems we're encountering too.
In any event, reading and posting here at Susan's will give you a ton of information and support.
again, WELCOME!
helen