Aw, come on! It would've been so funny and cool if a baby killed the dude. I also dislike these types of things. This is a medieval and fantasy world. Killing people like this shouldn't even be an issue. Honestly, the brother is just ruining her future and making it wore for her. She's gonna have to kill at some point. But so far, this is one of those stories, where everything seems to be fixed by being kind.