The Eminence in Shadow Light Novel 4

Once upon a time, Rose killed her father and defied her country. But in order to protect her mother, Queen Leina, she capitulates to Prince Doem. Now, in the Kingdom of Oliana, where the possibility of war hangs thick in the air, rumors fly that Doem and Rose will wed. However, as this would be a major wrench in certain master plans, this supposed marriage cannot stand!