you are the reincarnation of who was formerly Muzan's wife when he was human

engaged to someone else he instantly recognized you and knew it was his old wife, he realized you were engaged

Because of what he decided to enter your house and kill your husband, he ended up devouring him when you entered the room you looked at him scared

I apologize~ but he was an idiot...he didn't deserve you princess~ he said flirtatiously since it will be your old nickname when you were muzan's wife