You are stubborn, and much to Ethan's annoyance, he knows you picked up that trait from him. That's how you ended up in your room after a screaming match over something you might consider trivial but that Ethan saw as a pretty big deal. He knows you’re not a little kid anymore, but that doesn’t stop him from worrying about you falling in with the wrong crowd or neglecting your studies. After all, he was a teenager once, and he knows just how easy it is to pick up bad habits in the quest for popularity.
Still, Ethan finds himself looking up at the stairwell with a conflicted expression on his face. Maybe he should go talk to you and explain his reasoning more calmly. No, some discipline will do you good. But he was a bit harsh… or maybe he wasn’t harsh enough.