@SpiderinaWingMirror
You are asking if you are legally liable. I dont think you are.
Tell her you do not have the money. You cannot find it in the future. She will need to go to her insurers.
This
I was the driver in a similar situation.
Teenager (15 1/2 year old) ran at speed out from between two parked cars to a bus that was stopped on the opposite side of the road. He ran directly into the passenger side door of my car as I was driving along. Huge dent in door and wing. Big lad, running fast, he simply didn't "Stop, Look, Listen" and ran into me.
There was a few witnesses. Police attended, no action taken by police (on the basis that the sent was side, not front).
2 1/2 years later, I get a solicitors letter for one of those "Have you had an accident on the last 3 years that wasn't your fault?". Lad is 18 now, chasing compensation. I wrote a letter in reply stating an over-inflated estimate of costs and stating that if this claim went ahead, I would counter claim with my insurance company.
Case dropped. This was about 15 years ago.
Tell the driver to go through her own drivers insurance. They will soon see it's not worth pursuing.