Was she charged?
Usually if the police attend an accident they pretty much charge there and then and let the procurator fiscal decide if the charge needs to be followed up. Six months is still usually the limit I believe.
My mate was in a similar situation when he passed his test, he basically pulled out in front of a speeding van, he was charged with careless driving but was never prosecuted.
So, I wouldn't bother worrying unless she was charged, in which case the charge will probably not be followed up on if you haven't heard by now!