[Yes it could end really badly... he's appreciating now the full extent of the whole thing, why she's so upset.]

As if I ever drop my guard. [After all, you're talking to a man who refuses to get out of his armor.] Still, a threat from within is something to be especially wary of. I'll be prepared for whatever must be done.

[He thinks he'd be doing the guy a favor by putting him down if and when it's needed. It's what he'd want.]