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?

There were a few novels that fit this category: " Cute Poison Concubine: Please Take This, Your Highness "," Crown Princess Concubine's Concubine's Concubine "," Prince's Cute Concubine "," General Poison Concubine: Evil King's Unbridled Favor "," Cute Poison Concubine: Black-bellied Prince Is Busy Courting His Wife "," Unique Love for Two-faced Crown Princess Concubine "," After Rebirth, Prince Begins to Pursue Me "," Evil Barbarian Crown Princess Concubine "," Destined Crown Princess Concubine "," The Stubborn Crazy Wife's Concubine Is Escaping "," Playful Crown Princess Concubine ", and so on. I hope you like my recommendation.😗

The female protagonist Liu Wangshu was the Crown Princess in her previous life. In this life, she was forced to marry the Crown Prince who did not have a long life and was not favored. She made a deal with the Crown Prince. He pampered his white moonlight while she lived her carefree life. She used the universal system to open a medical center and earn money. He only wanted to be carefree in this life. What was wrong with a certain shameless master? The plot is fictional, please do not imitate it. I hope you like this fairy's recommendation. Muah ~😗

😋I recommend the following two books to you: 1. The female lead was the uncrowned king of the assassin world, and in one day, she transmigrated to become the useless crown prince of the empire. It matched the title. The female lead was the crown prince consort! The male lead was the emperor who was not pleasing to the eye. The two of them were in love/hate until the end of time. 2. "Defiant Queen: The Emperor Flipping Over": The female protagonist was spoiled into a fairy in her previous life. In this life, she has an aura that can obliterate everything. She has become the most mysterious young master of the Demon Palace. The male protagonist is one of her pursuers. There is a strong attraction between them and the emotional entanglement of love and hate. Moreover, the male protagonist is also an "emperor", which fits your requirements very well. I hope you like my recommendation, Mwah ~😗

I recommend Drunken Dream's new novel,"Raising Mink to Become a Concubine: Your Highness, the Trap is Deep" and "The Bloodthirsty Concubine: Your Highness, Please Lie Down" by Puppy Loves to Eat Meat Bones. They are both ancient romance novels. The female protagonist has transmigrated and become a close male pet. The plot is very interesting. You will definitely like them. I hope you like this fairy's recommendation. Muah ~😗

I recommend Crazy Concubine's Poisonous Steps to the World. The female protagonist is a top medical expert in the 21st century. After she transmigrated to ancient times, she was broken off by the Crown Prince and framed. She used her medical skills and wisdom to reveal the true colors of the Crown Prince and the white lotus, step by step, and finally made them pay the price. This book was about the ancient romance of the female emperor's dynasty. It met the requirements of the female protagonist knowing medical skills and the male protagonist being the crown prince. I hope you like this fairy's recommendation. Muah ~😗

The novel I recommend is 'My Favorite Concubine: Emperor, Take It Easy'. The male protagonist was the Emperor, the female protagonist was the Crown Princess Consort and the male protagonist's daughter-in-law, and the female protagonist was a reborn character. The male lead doted on the female lead, and the female lead was still a virgin. If you like favorite novels, this novel is very suitable for you to read. I hope you like my recommendation.😗

I recommend the novel Evil King's Domineering Pet: The Trash Prince Is Pregnant to you. The female protagonist was a good-for-nothing Crown Prince who was disguised as a man, while the male protagonist was the Regent. They were slowly sprouting in love and killing each other. This was an ancient romance novel. I hope you like this fairy's recommendation. Muah ~😗

I recommend "The Seductive Empress, I'm Hungry Again!" This was an ancient romance novel. The female protagonist, Hao Chi, was a natural foodie and a "super chef." She used delicious food to subdue the three-year-old tsundere princess, the forty-year-old cold-faced empress dowager, and the emperor who suffered from anorexia. She could conquer the appetite of many people. The male lead was a cold CEO with anorexia. He was as thin as a piece of paper. It was not until he met the female lead that the CEO became a foodie. His moral integrity was a passerby, and the overbearing CEO became a wife-doting demon. This novel was full of delicacies and emotions. It met the recommendation requirements. I hope you like this fairy's recommendation. Muah ~😗

I recommend "Destined Crown Princess" to you. The male lead was the crown prince, and the female lead was the crown princess. The two of them often quarreled in the palace. After the female lead was reborn, in order to seek justice and revenge, she was as fierce as a tiger in the palace. The male lead changed, and she was still the crown princess. The new Crown Prince was lecherous and tyrannical. The female protagonist looked at the smiling and fawning man in front of her and thought, This time, it won't be for nothing, right? I hope you like this fairy's recommendation. Muah ~😗

This plot can be referred to the following novel title: "Feng Qiuhuang" The story took place in ancient times. The male protagonist was a prince and the female protagonist was a princess. The two of them grew up together and had a deep relationship. However, due to the political struggle, the male lead was forced to marry the female lead's cousin. The male protagonist had always had a crush on the female protagonist, but the female protagonist married another prince, causing the male protagonist to suffer in his heart and try to get the female protagonist to return to his side through some means. In the end, the male lead successfully won the female lead's heart and the two of them got back together.