Haha yeah, because even if she does tell him not to, he will still follow her. I think after a little while he won't even really mind if he is being used a little. Espeacially if it involves killing someone. :p no by the time she has to get the key he should be warmed up to her enough to not want to kill her. 

Ah! Haha well it should be fun than. Would you like for me to start darling?