The Strongest Son-in-Law in History

(Completed) Reborn into a different world as a white-faced scholar son-in-law of a wealthy family, he was expelled for being too useless. So, he strives for improvement and finds an even more powerful and beautiful noble lady from a prestigious family to become her son-in-law.Practicing martial arts is impossible, it's impossible to practice martial arts in this lifetime, he can only rely on being a kept man to maintain his life!I want to train my wife to become the number one expert in the world, anyone who dares to provoke me will be beaten to death by my wife!