Olivia looked like a harmless little bunny before Wayne's towering figure. Her body was trembling subconsciously as she moved backward with her hands propping her up on the ground.
She looked absolutely terrified. That was precisely what she wanted him to see.
It was only logical for a normal person to want to run away when they had just seen a man kill an innocent person in cold blood.
It would be more suspicious if she were completely docile. It was a psychological showdown between the two