Besides, according to the plot of this world, the female protagonist will not be pregnant for a lifetime. This was because she had walked straight into the trap set by one of the vicious concubines and accidentally drank something that should not have been drunk. This made her unable to conceive for life.
The female protagonist will have her revenge and then suffer from depression for a while. She will get better with the affection of the male protagonist, and then she will decide to adopt one of the emperor's sons to make him hers. This adopted son will rise to the throne and make the female protagonist the empress dowager after the male protagonist's death.
This was actually the reason why the emperor would have many children. It was for the female protagonist to select which of the emperor's sons she would like to adopt the most, like selecting and adopting a pet that suits her eyes, of sorts.
