Unknown to her new employers, she has already murdered the father for whom she had been caring, and has falsified her references. Her inability to adapt to her place in society is masked by the cunning with which she conceals the truth about herself. Misinterpreting every act of kindness she is offered by her employers, she eventually turns on them, stealing the guns that are normally kept locked away.
She has a dark secret: she murdered the father she was caring for and lied about her past. Despite being welcomed into society, she is unable to fit in and manipulates those around her.  Eventually, she betrays her employers by taking their guns.