Boundaries? oh my.
I hope it's called a relationship. You put boundaries on her, don't you, if you want to call them that?
I prefer to look at a relationship as a set of joint agreements. Those agreements don't have to be static, but they should be mutual and entered into in a loving environment.
For example: I'm sure that my wife would not be pleased if I went out partying by myself as Tina. However, I'm not sure either of us would be happy if the other wanted to go out partying by ourselves presenting any gender! The point would be that we want to go out together! If she's not comfortable going out with Tina, for whatever reason, why would I want to force that upon her? She's my wife and my loving companion. Conversely, if I were unhappy about a certain issue, she would respect my rights.
Let's face it, presenting a different gender MTF is not exactly mainstream, and has many possible negative ramifications. We're not exactly talking about what color to paint the house, after all? Not everyone is totally open-minded about our "hobby".
Be calm, be loving, and work toward helping each other.
good luck!
tina