Well - my first reaction would be shock, since she hasn't shown ANY inclination before this.
My second reaction would be "H-m-m-m. Maybe we can switch roles. (s)he can be the man of the family and I can be the lady of the house. Win-win!"
After that, I'd consider various combinations. We could also have girls' time, guys' time, and even regular "normal" time... options that don't even exist in most relationships.
About the bedroom, I don't think I could do the male to male thing. I'm just not turned on by that (but that's just me). I'm pretty sure though that I could be the girl with my partner as either one. But a ZZ top beard would probably get in the way.
Of course, the OP question is somewhat invalid with me, since I'm already gender non-conforming. Ask that same question of a non-T* person and the answer would be a whole lot different.