Your post brings up a question in my mind. You said she tried to "turn" the bike in the curve. Has your girlfriend taken a basic rider course as offered by the Motorcycle Safety Foundation (http://www.msf-usa.org/
)? Given her obvious lack of experience, this course could actually save her life! (BTW, it's mandatory in many states...how 'bout yours?) OPINION: Too many people ignore basic rider training a put themselves and others at risk, too often.
One of the very first things you learn there is motorcycle control techniques and that includes "pushing" the handlebars in the direction you want the bike to go. (This is an edit after some discussion: MSF's Basic Rider Course (BRC) teaches you to apply light forward pressure on the grips of the handlebars in the direction
you want the bike to travel. This works best at speed of course. Try it if you don't do it already, just simply push LIGHTLY on the right handgrip and the bike will go right, left to go left.) Trying to "turn" i.e. "steer", the bike is the exact OPPOSITE of what she needed to do, especially in a critical situation like she was experiencing.
So, numb hands or no, it seems that a little bit of training could have avoided this situation. I urge you to help her live long. Get her the training she needs, man.