The concubine, a former cannon fodder, becomes pregnant, and the childless prince spoils her rotten.

Lin Zhizhi, trusting the concubine's feigned help, was sent to the prince's bed. Although she became a concubine, she was disliked and never received his favor again.
She was murdered because her mother discovered that she was deceiving her while in charge of the household affairs.
The princess who told her everything was actually the culprit behind her infertility.
Her aunt and cousin, who always liked to cry and sympathize, secretly plotted to climb over her to become her masters, and ruined her reputation under the guise of doing what was best for her.
The royal palace that sheltered her collapsed overnight because of a female advisor disguised as a man, and she was exiled to become a military prostitute and died tragically in a foreign land.
Only then did she realize that the world she was in was merely the content of a book to that advisor, and that ruthless advisor was the female protagonist who had transmigrated into the book.
The system that binds her to having children allows her to be reborn, turning the tide and saving her parents' lives. She then actively seduces others to become a concubine again, striving for a chance to survive.
From then on, good news kept coming from the Prince's mansion, and she became his beloved daughter with three children in two years...