@Andres no, that's not what she meant, the reason she acted like that was because after all that fluffy moment, she had forgotten who he really is, and what the actual world she's in. She's not dumb for being human, or to have human conscience of a earthling or a 21st century mindset. She was not shocked and scared that he killed him, she was shocked with the GRUESOME WAY he killed em. Have you seen her fight? Kill? Exposed to gore situation? No. She's simply had a normal reaction of a normal person. If she was out of touch in that situation it would've been unrealistic according to the build up plot for her.