Why did Yu Wen and the Queen have a second child in Lonely World?

Are you asking why Yu Wenyu in the lonely world gave birth to a second child with the Queen? Because they are husband and wife.

In the movie Lonely World, Yu Wenyu and the Queen are husband and wife. Although Yu Wenyu is very weak, he really cares about Prajna Dugu. Prajna Dugu was moved by Yu Wenyu in the follow-up process and gave birth to two sons and a daughter.

Dugutianxia mainly tells the story of three daughters, Duguxin, Prajna Galo and Mantuo. Because of Dugutianxia's divination, they gradually changed from a noble family to a king's daughter.