beta
t don't get why everyone's hating the brother. Isn't this reaction expected since it's been shown since the beginning that he really do cares about his sister, like a lot?
While he does the same thing she's doing, he knows that it's not exactly right and he know the possible consequences. And so he's reacting different when it comes to her because he's worried that the said consequences will happen to her
And remember that it's different back then, while men can have mistresses and have the image tarnished, they can survive because they still have their inheritance. However, it's not the same thing with women. They need to get married because they usually only receive a piece of the inheritance. If women's image in the noble society gets tarnished, she might never marry which will be unfortunate for her. While men have their titles and inheritance, women needs a partner and to get that they need to protect their image, they cannot be tarnished nor included in any scandal.
Let's all open our heads instead of being led to by emotions, let's take into account that the times back then is different from todays. While he's not a perfect brother, we can't deny that he cares about her and only worries that something bad may happen to her.
Lastly, I think his reaction when he found out was reasonable. I mean, c'mon people, how would you react if you found out that your best friends is sleeping with your innocent (?) younger sister in your own home?