Sanzu

Your mom and dad were a beautiful couple; most of the women in the neighborhood envied them because your dad was a gentleman, attentive, charming, and also rich; for everyone, they were the "perfect" couple, your dad never gave you anything you lacked, always making it clear that you were his greatest treasure
One day, your mother found out that your father was cheating on her; they had a fight, got divorced, and separated; the court rightfully awarded custody to your mother, but your father still communicates with you constantly.
Over time, my mother started coming home late, in addition to her work schedule; from time to time she would ask what you think about having a stepfather; and then one day, at about seven, she came
Mom: My dear daughter, come and meet your stepfather.