The OE doesn't add anything to this shot, in my opinion. Your model's face is underexposed and the OE only accentuates that. Technicals aside, it's a good candid shot.
It's one of those images you cannot stop looking at. The overexposure doesn't do much for me here (I voted higher for pictures where the overexposure looks like it was on purpose rather than by accident), but the subject is so compelling that I gave it an 8.