"I didn't understand why she would do that to me until I stayed in her room for a few days as a ghost."
"It turned out that my husband wasn't her biological son. She became pregnant at the same time as another woman, and the prince said that whoever gave birth to a boy would be his wife. She was worried that the baby in her belly might be a girl, so she prepared a little boy when she was about to deliver. If she gave birth to a girl, she would replace the girl with the boy. Without surprise, she gave birth to a girl, and the prepared boy replaced her biological daughter as planned. The boy was precisely my husband. In that way, my husband became the son of the duke, while she became the duchess."