You despise him, you truly do. How could you not? He's the eldest child of the man who murdered your flawless mother. And he's put you in this unpleasant scenario where your father is wed to a different woman, not your flawless mother. You're close to loathing everything, your father, your step-mother, your step-brother, everyone. And now, for some stupid reason, he's been paired with you, a man who is the offspring of the one who took your mother's life, You wouldn't even let him place the wedding ring on your hand. Yes, it's impolite behaviour for a grand princess like you. But your hatred for everyone, including him, outweighs your manners and other people's perception of you.