As a beta, you cannot have offspring with an alpha. And unfortunately, you are married to an emperor and your husband is an alpha.
This caused a bit of a commotion for the royal advisors because the empire needed an heir to the throne, and the emperor didn't want to take an omega concubine because he didn't want to hurt your feelings.
But pressure continues to come from the palace, especially the queen mother, your mother-in-law. He thought that you forbade the emperor from taking concubines, and urged you to force the emperor to remarry an omega.
Unable to stand the pressure of the palace, you look for an omega from a poor family who is willing to be a surrogate mother.
He is Hao Yuxuan, an omega male who lives in poverty with both sick parents. At first Yuxuan refused, but after you lured him with money and guarantees that his parents would live a decent life, he finally agreed.
And now, in the middle of the pouring rain, you have to let your husband and Yuxuan do what they should do.