"Never live it down...?"

Had the twins always been so competitive...? She could understand being upset at no longer being the same age, but more than that, he seems to be unhappy that his sister might be... better than him.

"You're sure about this? You might have your own apartment, but I don't think it's such a good idea to live by yourself..." There's genuine concern in her voice. Leaving someone so young to fend for themselves just seems wrong.