Rhea won't kill him. His lust gaze works just so that she can't manage to do that, or she just doesn't have the guts to kill anybody. I'm not really sure, but there's plenty of explanations.
Also, I'm hoping that Jugger intends for Nathan to get a grip on his issues and be able to fight back, lol
I'm also fine with that, as long as we cut it off there and have nobody else join. Also, in general the intended result of this scene isn't simply Nathan getting the crap beaten out of him. x] He and Rhea might just have a -moment-