Ok so the first point I will make is to seek legal advice, the situation has got quite serious now and you simply can't ignore it.
Secondly, insurers have 3 years to settle a claim. I have an accident in September 2006 which was dealt with quite quickly and didn't hear anything for years. Fast forward to July/August/September 2009 and things started to move and the case went to court. My insurers appointed a solicitor on my behalf and I haven't heard anything since.
Everyone wants a piece of the action when it comes to accidents. If she has whiplash then it can't be proved either way. It's a bad situation, the fact she had no insurance will certainly complicate things but she will be paying the money from her own pocket, not her insurers. Good luck, hope she has learnt her lesson.