That’s because you’re not grasping the context of the story fully. You should ask yourself why Ines loves her brother so much despite everything that happened.
The point is You don’t defy the royal family. You obey or your whole Bloodline dies. Think about the fact that Ines ran with Emiliano knowing they would get chased and killed when found. She still did it and it happened because by running with him, she defied the royal family. The logic applies to her family as well. Because of her actions, they’re all at risk. Otherwise her brother could’ve just walked away that night when the crown prince made him listen to him r*aping Ines. Ines understands that and knows her brother loves her and that it destroyed him to do and say what he said. Their reality was atrocious and they all did the best that they could.
I can't find one reason not to hate that brother of hers. NOT ONE!!! He stood outside her door wwhen she was assaulted and the best he could do was tell her to accept it??? The fuck????