The truth was as follows: Lady Yan, in order to secure her favored status, sought to have the illegitimate children she had brought in become the only children in the mansion. Thus, she put an infertility drug into the tea he drank in his everyday life, making him lose his capacity to procreate completely. Consequently, he wouldn't have any children, regardless of how many concubines he had. In this life of his, there would only be these few 'wild children' that were born to Lady Yan and Shen Juhua, who was borne by his lawful wife Lady Cui.