TL;DR - This is a broad questions, and every situation is different. It's unfortunate that some people have bad things happen to them. Feel it out, get her the help she needs, be patient, but do not compromise yourself or lower your expectations because of her past.
My wife was molested by multiple members of her family, an older man in her neighborhood, and raped by another guy all before she was 18 years old. We live in LA, she's from a Hollywood family, and was thought that her sexuality was her primary source of worth. Needless to say, her head is entirely fucked. (note: I found all of this out after we got married, but the warning signs were there. If I knew then what I know now, right?)
We've been married 7 years. She cheated for at least 3. Once caught, she cried and used her past as an excuse when it was a simple case of AF/BB. She attempted flipping the situation so that she was the victim, instead of the perpetrator, I was the insensitive husband who couldn't possibly understand her past, and Chad was the hero (who BTW is also married, and has several bastard children conceived during his marriage by several other women). Yah...fuck that.
Since then I've learned a few things. She's nasty. She likes all kinds of crazy shit I never would have expected. She likes to call me daddy in bed, which is quite disturbing given her past, but I roll with it and just enjoy the moment.
So, my point is that she might not be scared in the ways you think. You'll need to dig deep to separate her real problems from her bullshit, and TRP will help with that. I sent my wife to therapy, and I suggest you do the same. I also don't accept anything less, or do anything differently, than I would with someone without those traumatic experiences - doing so just reinforces the behavior.
Now, before anybody says I should get a divorce, etc, etc; no shit Sherlock. I have a solid plan, have legal counsel, and have taken action to protect my assets to the extent possible. While things are put into place I'm working on myself, and repairing my marriage (these are one in the same). Thanks largely to TRP/MRP things have improved dramatically, although not without making epic mistakes as can be seen in previous posts.
If things continue to go smooth, great. If not, nukes will drop. While Outcome Independence is great in social situations, leaving my financial future in the hands of the courts is not something I will move towards without diligent preparation. Also, I would prefer to keep my financial situation and parental rights as they are - and will explore all sorts of alternative situations before divorce. There's more than one way to skin a cat.