Not any mention of how she came to be there in the first place?
I once knew of someone who entered a comp in a local paper to win a shoot at a studio..... She submitted a photo of herself an surprise, surprise, she won. It was pretty much the same, alcohol raunchy, contract....etc.
It was a huge scam! Everyone who entered won, everyone signed, but the studio wasn't their 6 months down the line.
They will shoot up to 100 *** per day averaging around £ 2-400 per contract, and then just disappear.
Thing is, if you refuse to pay and it is a scam, they will get pretty nasty, remember she gave an address.
At the end of the day, she is under age and they cant force her to pay, but they will try, and these *** if it is a scam really don't give up easily. They will expect that you can't get the law involved as it is not a criminal matter (as they believe they have done nothing illegal) immoral yes but illegal no!
That is until they fed alcohol to a minor.
They will expect that you can't prove this, which I expect is the case, but they will not take it far enough for that as they know a court would see right through their scam even if it may not be strictly illegal.
Don't pay, and don't be pressured or bullied. They will not overstep the mark in order to make it a criminal offence , even if it starts to sound as if they might.