FG2B, I mean this in the most constructive manner possible, and dear readers, as this is a message directly to FG2B, I'd appreciate the same understanding.
I know that this will be hard for you to do, that this letter/statement has utterly floored you and you will be feeling sick and shaken to your very core, but your demeanour in what you do next is crucial.
For your DD to continue being open and honest (which is VITAL for her) she needs to feel that she has a safe space to let that information out. She has to understand that what happened to her is shocking, it was wrong and that it needed to stop. She has to talk about it, open it up to scrutiny, to see how wrong it was. yes she will feel foolish, but it was a gradual process, and there are many hooks, excuses and much smoke and mirrors used in that process to wear her down to where he completely controlled her.
There are times when I say things in therapy that the counsellor raises his eyes at, and looks shocked. When he does that it kind of scares me a bit. It shocks me that something was bad, that bad, but I didn't know.
Your DD will have normalised everything from way back, and when she starts to open up, if she sees others in pain/shock/fear when they hear what she says, she'll clam up again. I know, cos I learned to do it pretty damned fast. If others start to tell us to get the hell out when we are not ready, we go into defensive mode.
This is why I'm often having my behind lightly frazzled when I say on some threads to back off the OP a bit, if she's only just realised that she is in a controlling relationship. As long as she is not in direct risk of life situation, I advocate careful contemplation, thought and planning.
SO... as long as you have the space to cry, shriek, freak out, both in RL and here, use it, but your DD needs to know that you can handle whatever she says. Come here and spill out if you need to, PM me if you wish, yes we will cry together I'm sure, but that's OK. Tears will dry. We'll live.
Ultimately you will have to find a professional that CAN hear her, that CAN deal with all her history, in the meantime, she may wish to talk to you.
If you can get to A/shot, talking there would be safe and she would be understood and accepted. When she is ready to do so of course.