Which novels were based on the plot where the male protagonist was the crown prince and the female protagonist was the distant sister of the male protagonist's mother? And the female protagonist married the old emperor in order to protect the crown prince?

Find a novel. The female protagonist is the distant sister of the male protagonist's mother. The male protagonist is the Crown Prince. In order to protect the Crown Prince, the female protagonist's family made the female protagonist marry the old emperor. The female protagonist transmigrated to ancient times from the apocalypse. The Crown Prince also transmigrated from the apocalypse. He liked the female protagonist before he transmigrated. The female protagonist was scheming and held power alone. The ending was that the female lead was in charge of politics behind the curtain. She was pregnant and everyone thought that the child belonged to the old emperor who had passed away. In fact, it belonged to the crown prince. Ask for a name

Answer 1

I recommend the ancient romance novel,"Koi Fish Three and a Half Years Old: The Prince's Little Milk Bun Is So Cute". The female protagonist was Yun Sangsang, the little koi. She had transmigrated into the book and became the abused female supporting character in the original book. In order to return to heaven and jump through the dragon gate, she diligently grew up and was busy with missions. However, she inevitably got engaged to the male protagonist, the Crown Prince, according to the plot. In order to protect the Crown Prince, the female protagonist's family allowed the female protagonist, Yun Sangsang, to marry the old Emperor. The female protagonist was the male protagonist's distant sister. I hope you like my recommendation. Muah ~