Responses

He won't know until much later who she is.
I think they will be civil.
I don't think he even knows he had a sister or that is the reason his mother hated him.
Since the father "killed" the daughter despite her mother wanting her.
And made the wife have another child she didn't want since he needed an "heir".
The father will offer the sister to be part of the family officially and she is like "nah".
Spoiler
..........
She is Alexandro's older sister.
The same baby the father wanted to be killed since it wasn't a boy.
Luckily, the person who he ordered to kill her didn't since he took pity on the child.
The Emperor "dad" is gonna want her to forgive him. lol and she is like "bitch, no way."