Damn It, Who Wants to Have a Baby with Their Love Rival?

My new historical farming-and-childrearing story is now underway: Moving to the City with My Wife and Kids. A straight guy transmigrates into a book and wakes up to find a baby in his belly. Blurb: Ji Congzhe is a spoiled, domineering rich second-generation heir. After pursuing his crush for three months, he finally hit a snag. His usually aloof goddess suddenly blushed and smiled as she threw herself into the arms of a male college student. Unable to swallow his anger, Ji Congzhe gathered some people to give his rival a good beating. But in the middle of the fight, a car accident sent him back to 1988. Because his family was poor, Ji Congzhe volunteered to marry a bachelor from the neighboring village just to get by. On the day of the wedding, he spotted a tall, arrogant man in the crowd. Who else could it be but that dumbass rival of his? Ji Congzhe never dreamed that one day he would not only have to share a bed with a man, but also plow fields and grow crops. As the days passed, he gradually got used to his rival, especially since the man had such a pure and pretty face. At last, Ji Congzhe couldn't hold back any longer. “You stole my goddess, so don't blame me for making a move on you.” But to his utter surprise, his seemingly refined and reserved rival was incredibly strong and immediately turned the tables on Ji Congzhe. A few months later... Ji Congzhe: “I think I'm sick.” His rival glanced at his waist, which had grown several inches wider. “Don't worry, you've just put on weight.” When the test results from the hospital came back, Ji Congzhe nearly fainted on the spot. His desperate howling echoed through the hallway. “Can someone tell me why men can have babies too?!!!” Reader's guide: Both leads are straight / younger seme / pregnancy and childbirth / happy ending +++++++++++++++ Tsundere, sweet seme x wild, goofy uke +++++++++++++++ Slow-burn farming / family life +++++++++++++++ This story has a 60% advance-reader lock ++++++ Content warning: The historical setting is fictional. The story follows its own worldbuilding. The author has never farmed, so it's all made up. Theme: Build wealth and prosper.