This Widower of Mine Got My Brother-in-Law to Take on Both Family Lines

The day after turning seventeen, Ma Xingyue marries the legitimate younger son of the Duke of Zhenguo's household to bring him good fortune. But just as the bridal sedan enters the gates of the duke's estate, his new husband dies. Unwillingly, he becomes a widower and is forced to observe mourning.

P.S. This is a story about male pregnancy. The setting is fictional, and coming of age is set at seventeen.

P.P.S. Super short story.

P.P.P.S. The bottom is sexually inexperienced; the top is not.

The top is the bottom's elder brother-in-law, the Duke of Zhenguo's eldest legitimate son and heir to the title.

P.P.P.P.S. The top is a widower with a son.

He gets together with the bottom to provide an heir for his younger brother, so the brothers share the inheritance line.

The bottom has a child, but the child is not allowed to call him Father, only Uncle.

Theme: May I be like the stars and you like the moon, shining together night after night