Empress, the Eldest Grandson of a Generation of Owl Queens

After an unknown luminous object hit her hard on the head, she miraculously traveled through time. During this era, she was betrothed to the second son of a noble family. Not long after her marriage, her husband helped her win the throne, and she also helped her husband eliminate dissidents step by step, and climbed to the highest peak of power step by step. How will she compete with many women for a husband? How to establish a foothold in that society?