I agree, I do think she deserves to hear the whole story from both you and Arthur.

Did I ever tell you about when Frank recruited me to the Order? I was still in training, and we'd been dating for a few months. When he told me about the Order, I was a bit angry with him for not being open with me, but I gave it some thought, and recognized that it was about something more than just me and him -- he'd done it because he had to, not to hurt me. And, in the end, it made us so much closer, because we didn't have those secrets hanging between us.

I know she'll understand why you didn't tell her right off. I really do.