I had the same thing happen to a five week old Mini. The very same day, I discovered that some idiot had put a 4" scratch down the rear left corner of the car. That night, it was someone's stag do, and as I don't drink, I was on driving duties. We pull up into a car park and my passenger flings the door open, right into another attendee's 4x4. Result: a lovely chip on my nice new paintwork.
After expressing his dismay and saying he would pay up, he and everyone else wandered off, leaving me seething (I should gave gone home immediately). When later he realised that there was another scratch on the car and I would need to get some respraying done anyway, he changed his mind and refused to pay for repairs. We had a "discussion" about it on Facebook, but he was adamant he wasn't going to pay.
I haven't spoken to him or otherwise been in contact since. It wasn't so much the damage that annoyed me (that could happen to anyone), but his "couldn't care less" attitude. Still, there was a good side, as it made me re-evaluate why I was friends with him at all, as it wasn't the first time we'd had "issues". Some people just aren't worth bothering with.
OP: that's terrible! Did she offer to pay for repairs? Hope you get it sorted soon.