In my eyes you where wrong to move the car before taking photos. doesnt matter if your blocking the road, you need to take as many photos as possible and get the scene documented for police and insurance reasons. Its always difficult when the shock sets in. You just want to get out the way as soon as possible. As said go back to the scene, take photos get a friend whose good on photo shop to mock up the situation from start to finish. If shes saying its your fault damage to the cars will suggest otherwise. Speak to the police and get a accident investigator down and look at the scence and both vehicles even if its all been moved. Not sure if they will but they would be able to write a report suggesting what happened.

I'm sure you can fight it but looks like it will be a long process......