I would certainly report this to the police, at the very least she was driving without due care and attention. The police may well want to know why she has not reported an accident where someone has suffered an injury.
I would also take some legal advice. You may have only suffered slight injury, but I would still think about an injury claim. Not so much for the compensation, but for the affect it may have on her future insurance renewal. A few points on her licence and a few quid on her premium may make her concentrate in future.