I actually keep a cheap camera in my car (hidden, or course)(no, I don't have a camera phone) just for such said problems. I would even go so far as to record any conversations onto the phones recorder if agreed upon. Also, there is no substitute for writing down the events and getting each other to sign it. I realise this info is useless to you right now, but it may be in the future. Also, just one little observation: just looking at the position of the damage, it would have been difficult for you to have purposely caused it... you MUST get an insurance firm assessor out to inspect the damage. After all, lodging a fraudulent insurance claim is illegal and an offense. If you don't, and go through insurance to fix the car, your insurer may not renew your contract resulting in insurance exclusion, and you'll find it difficult to get insurance in the future. That all said, I just read that you only had 3rd party. But that's fine - find out who her insurer is, state what happened, and invite their assessor for inspection of both vehicles. Was her car damaged?