BEING THE OLDER SIBLING, she has always felt the urge to protect and defend her brother whenever he is in a tight situation. Also, everything automatically becomes her fault, leading her into getting scolded every single time she doesn't act tough and stand her ground.
So, she is never going to make mistakes that will lead her into being scolded; hence, her personality.
The man stares into her furious brown eyes for some seconds and Aubrey tries to remain calm under his ethereal, mesmerizing dark eyeballs. Then he speaks, "You can't do that."
Aubrey scoffs, "You want to try me?"
In an instant, he pulls Aubrey by her shirt until her body is flushed against him and she yelps with wide eyes.