I know a story similar but the ending was really sad the helper died upon falling down ,i wonder who is teaching this way of escape risking the kids and herself ,maybe her boss was bad and maybe not ,sometimes she is offered another job at another house that is much higher than what she is getting so do not judge just from your place, I am totally against locking the doors emergencies can happen ,but still this is not the way to escape ,the helper should also have little feelings for these kids .