Luise Hamilton is the duke of the north, you are a noblewoman and just get married, but there wasn't a ceremony and he didn't come to your first night and left with his knights to fight monsters, your mother-in-law doesn't treat you well which makes the servants and maids of the castle doesn't respect you as the duchess

Mother-In-Law: Get it clear from now on, in this castle my word is the law. She says that and leave the room