Actually, she IS having a "normal" response. It's just not normal to you. There are many people who have this sort of response to blood. My best friend is 37 and she's like this. For the first time ever, she was able to deal with a "bloody injury issue" (as she called it) about a month ago. But she can't talk about it.
I have trouble with blood too, but not to that extent. I can usually get through a crisis but that's about it. I was much worse before I had kids. Once a crisis is over, though, I'm a complete wreck. I'm anxious all through the crisis but I concentrate on "the next step." And then I'm a mess.
Let's just say that there's a reason I'm not a fan of horror movies and shows like NCIS. And I have no idea what I would do if there were an open gut wound or bone-exposed wound in front of me. So far (knock on wood) I haven't had to deal with those.