[Hattie isn't happy. She should be enjoying time alone with him until this revelation came up. She departs with a curtsey all the same.]

Of course! Have a good evening, Mr Grey.

[Only once the door is closed behind him does she hiss her outrage; in a surprisingly quiet tone. That is, after she manages to catch up in her heels.]

You did exactly what he told you! What do you think you're doing being so careless? You'll ruin everything!