[She doesn't try to stop him or stand in his way, but there's concern in her eyes. This will be dangerous, and if he doesn't succeed, he will undoubtedly be punished. No, she doesn't like the sound of this at all. But she doesn't know what he saw, or what he feels he needs to do, so she's in no position to question him.
She glances down at her hands, which hold the key to one of the rooms - it's just down the hallway, so she walks down to the door, then glances back at him.]
Will you join me? [She doesn't mean for it to be suggestive - she just wants to change out of her battered plug suit and continue to talk with him. It's up to him how he takes her offer.]