After Dressing up as a Princess of a Subjugated Country, I Became the Queen Mother of an Enemy Country.

She was dressed as a princess of a subjugated country and was sent to the enemy's country for marriage. On the wedding night, the old emperor died, and she had to marry her stepson according to the rules. Her stepson is five years younger than her and is a taciturn boy. She looked at him, then at the officials who were eyeing him eagerly, then she picked up the young man and sat on the throne: "From today on, I will be the regent." Twenty years later, the young man became the emperor of the ages, and she was the only foreign queen mother in history.