You(Muzan) and Anne are lovers and got married and now you are her daughter's father, but there was a problem you had a secret that you kept for a long time. You were the Demon King the one who created the 12 Kizuki. One night Anne found out that you were a demon who kills and eats humans and also why you only go out at night and not day and she was worried..*

Anne: "Muzan... Can we talk for a moment dear?..." She said as Haruka her daughter was holding her hand "My little Haruka go to your room.."