I would think that the authorities would need more than just her word to take any action so I wouldn't worry much about it from that end. If you're worried about her personally doing something to any of your babies then make sure to keep a close eye on them and don't leave them outside unsupervised. Also keep the note she left and any other incidents that might occur, that way if something does happen you have something to go on and can go to the authorities with it. I'll keep my fingers crossed that it won't come to that point though. Best of luck to you, and please keep us informed.