Talk. Have patience.
Those are the 2 things which I think are most important, and certainly in this case. I agree with gaffer in that you should talk to her about the situation. However, without trying to undermine anyone, and please understand this is just my opinion, I would never ask anyone to come out.
A couple of my friends who know I'm gay have badgered me about coming out completely. I hate it. Who I tell and when I tell is up to me, and nobody should force anyone else to come out.
Just give her time, and let things work themselves out. Strangely enough, they usually do.