I Raised My Nephew and Got a Husband

"The heroine's younger sister ran off with the supporting male lead in the dead of night, leaving her child behind. To save the child, I fled to the countryside with the baby. 'I'm sorry, honey. Can't you please forgive me just this once?' Why is the villain pretending to be the baby's father? 'Did I or did I not tell you to always wear baby socks?' The nagging demon king……."