As the parent it was your job to teach your child about all hazards before they happened. For example you should teach your child about guns and how to safely handle them, even if you against them. Some day they might run into one, and burning down your house is the least of your worries if she shoots her self or some one else.
If anyone should be in trouble it should be you. Your the reason she didn't handle fire safely. I think she has lost enough of her stuff as punishment and knows that she did something wrong.
You should sit in time out~ Cheers
Jon W