She's only chatting, not reading his thoughts; he'd have to verbally offer for him to know that she's welcome.

She considers arguing with him. She decides not to bother. If he doesn't care, he doesn't care. If there's a way to make someone care, she doesn't know it, and wouldn't do it anyway because that's one of the things she cares about.

Instead she says:

Why did you tell me, then? If it doesn't matter if people die unless they eat you alive when you ask nicely?