In Joy of Life, the relationship between the Crown Prince and the Eldest Princess was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and had deep feelings for each other. There were some different versions of how the Qing Emperor knew about their private affair, but the specific details needed to refer to the content of the novel.

The eldest princess and the eldest prince had some interaction and cooperation in the play, but no exact ending information was provided. Thus, I don't know how the relationship between the Eldest Princess and the Eldest Prince will develop.
The Eldest Prince and the Eldest Princess were in the same group in Joy of Life. Together, they plotted a series of conspiracies, including using the Crown Prince's banner to do bad things, smuggling activities, embezzling money, and so on. The Eldest Princess had an affair with the Eldest Prince and formed an alliance with him. However, their plot was eventually exposed, causing the Eldest Princess to go crazy and plan to assassinate the Qing Emperor. In the end, she committed suicide. The Great Prince rebelled, but was ultimately defeated and killed by the Qing Emperor. Therefore, the Eldest Prince and the Eldest Princess were in cahoots in Joy of Life.
In the novel," Celebrating Years," the relationship between the Crown Prince and the Eldest Princess was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and had deep feelings for each other. There were some different versions of how the Qing Emperor knew about their affair, but the details needed to be described in the novel.
In Joy of Life, the relationship between the Crown Prince and the Eldest Princess was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and had deep feelings for each other. However, their affair was eventually discovered by the Qing Emperor, causing the Crown Prince to be stripped of his position and the Eldest Princess to be placed under house arrest. In the end, the two chose to commit suicide.
In the novel," Celebrating Years," the relationship between the Crown Prince and the Eldest Princess was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and had deep feelings for each other. There were some different versions of how the Qing Emperor knew about their affair, but the details needed to be described in the novel. After the Qing Emperor learned of the relationship between the Crown Prince and the Eldest Princess, he abolished the Crown Prince's position and placed the Eldest Princess under house arrest.
The relationship between the Crown Prince and the Eldest Princess in Joy of Life was that of an auntie and a nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and had deep feelings for each other. There were some different versions of how the Qing Emperor knew about their private affair, but the specific details needed to refer to the content of the novel.
The Crown Prince and Eldest Princess ended up committing suicide. In " Joy of Life," the Crown Prince and the Eldest Princess had a special relationship. It was not just a relationship between a nephew and an aunt. In order to take revenge on the Eldest Princess, Fan Xian told the Emperor about the relationship between the Crown Prince and the Eldest Princess and planned an incident to expose them. The Emperor's feelings for the Eldest Princess were also a little unusual. After learning of the relationship between the Crown Prince and the Eldest Princess, he placed the Eldest Princess under house arrest and prepared to abolish the Crown Prince. The Eldest Princess secretly joined forces with the Qin family and the Ye family to plan to kill the Qing Emperor and let the Crown Prince succeed the throne. However, after the plan was leaked, it failed. In the end, the Eldest Princess and the Crown Prince chose to commit suicide. The Eldest Princess had another identity. She was Lin Wan 'er's mother.
In Joy of Life, the Crown Prince and the Eldest Princess had an intimate relationship. The Eldest Princess was the Crown Prince's aunt, and the relationship between the two was not allowed in ethics. The woman in the Crown Prince's painting of a beauty was the Eldest Princess. Their affair was eventually exposed by Fan Xian. When the Qing Emperor learned of it, he was furious and banished the Eldest Princess from the capital. The Crown Prince was sent to Nanzhao. The Qing Emperor's feelings for the Eldest Princess were complicated. The Eldest Princess loved the Qing Emperor, and the Qing Emperor was willing to give her power and status. However, when he learned of the relationship between the Eldest Princess and the Crown Prince, the Qing Emperor felt that he had lost control. His trust and pity for the Eldest Princess was also affected.
In the novel Joy of Life, the relationship between the Crown Prince and the Eldest Princess was that of an auntie and a nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and had deep feelings for each other. Their affair was eventually exposed by Fan Xian. After the Qing Emperor learned of it, he was very angry. He put the Eldest Princess under house arrest and prepared to depose the Crown Prince. After the Eldest Princess learned of the Qing Emperor's plan, she secretly joined forces with the Qin family and the Ye family to kill the Qing Emperor and push the Crown Prince to the throne. However, the Eldest Princess 'plan was leaked from the beginning. In the end, the Eldest Princess and the Crown Prince chose to commit suicide. The search results did not provide any clear information on how the Qing Emperor had found out about their affair.
In Joy of Life, there was a special relationship between the Crown Prince and the Eldest Princess. They were auntie and nephew. They had relied on each other since they were young and had established a deep relationship. The Crown Prince persuaded the Eldest Princess to sacrifice herself in exchange for the peace of the Crown Prince's family and prevent the outbreak of war. However, their affair was eventually exposed by Fan Xian. After the Qing Emperor learned of it, he was very angry. He put the Eldest Princess under house arrest and prepared to depose the Crown Prince. After the Eldest Princess learned of the Qing Emperor's plan, she secretly joined forces with the Qin family and the Ye family to kill the Qing Emperor and push the Crown Prince to the throne. However, the Eldest Princess 'plan was leaked by a spy from the Ye family. In the end, the Eldest Princess and Crown Prince chose to commit suicide. In general, the relationship between the Crown Prince and the Eldest Princess played an important role in the story, showing the struggle and choice between power and love. The search results did not provide clear information on how the Qing Emperor had found out about their affair. Therefore, I'm not sure about the specific plot of the Crown Prince and the Eldest Princess in Joy of Life.