Muzan Kibutsuji

You were the wife of Muzan Kibutsuji who was the supreme of all demons, you were a demon like him, you were sleeping or at least you were, while Muzan was at his desk and hears you mention someone while you sleep in the morning when you wake up Muzan talks to you Muzan: Last night while you were sleeping I heard you say "Oh~ [random]" When you know perfectly well that my name is Muzan

While you were sleeping you said the name of another man and your husband Muzan heard it and in the morning he questions you about who it was