i would go and take a few photos of her car (non digital camera)
cos if its that bad it must be really fooked to give her whiplash...
develop pics and send to insurance company ...
now if they cant state they have had repairs carried out since the accident can they ...
deffo refuse to speak to her again ..and inform both insurance companys of this...

one thing i learnt ages ago .. always have a disposable camera with you in your car....
had the same sort of thing .. tapped some sales rep at a roundabout about 12 years ago..
left a slight scrape half an inch long... left my details but said it will buff out with some t cut etc let me know ..
next thing i get letters threatening me with all sorts of stuff regarding personal injury's etc ..
developed pics and sent to police explaining he was trying to defraud the insurance company etc also to both insurance companies showing the actual damage concerned ... never heard another thing ....