
I hope she won't be that heartbroken when she found out Ain's true personality huhu. Also, she should really open her heart to father

Spoiler
Ain continues to take the poison afterwards but hides it from FL. ╮( ̄▽ ̄)╭
Basically Ain knows the poison training is good for him, so he won't have any weakness.
He just wants to make the FL be on his side, it's fun for him that the Duke can't do anything
I expected all those things to happen but my heart still aches when I read it.