Now, that your eyes are open, to this reality, what's the next step, aside from logistically getting her out of the home? Are you and your fiancé reading up on all the literature that is out there, and working on overcoming the repeated pattern of abuse?

I might add, there is a thread of interest down in the Psychotherapy Forum, about the Drama Triangle. I've read it before, it helps explain things, in it's own light. Hope you both, find it, helpful and of interest.