I think he doesn't like being called brother because he doesn't have have brotherly feelings towards her.so being called brother is kinda like rejection
You know alphonse could be the problem not chloe (as in why she can't get pregnant). I think it'd be really interesting if for once the guy is the reason why they can't have kids (〜 ̄△ ̄)〜
There is one manhwa with the Guy has the problem with them not having kids.. and many more problem .... but to this i dont think AL is the problem ╮( ̄▽ ̄)╭
Omg she totally left him hanging with his confession