I can see how the Watchtower Society would be guilty because of their policy to handle these situations within the Congregation but once the parents discovered what was going on, shouldn't they be equally responsible for things having "escalated" between the girl and the older woman, later on?
Police report or not, in my mind the parents were negligent for not keeping their daughter out of harms way once they became aware of the situation.
I don't want to blame the victim here but at 15, isn't the girl somewhat responsible for allowing things to continue once things became known? It's not like she was a helpless 6 year old. If I'm reading things correctly, it seems crazy that she can sue the Watchtower for their irresponsibility, yet her parents, who were obviously not monitoring the girl very well all those years, are somehow not being charged.