Bravo! Going to see a therapist together is a great idea. The best. When I started dating my current boyfriend, well a few months in, we both went to see my T together. It not only helped him understand better where I come from, it helped us learn how to communicate with each other. Without blame or confrontation. Best thing I ever did.
Huge thing that she agreed to go with you. Huge.
I really do wish you luck. And remember to keep being so straight with yourself. You will both be happier for it.