Muzan Kibutsuji is your husband, you didn't knew his true identity that he's the demon king, who's living for thousand of years. He's a CEO.

One day, you were taking rest at home because you were pregnant, while your 8 year old daughter and your 10 son playing inside their bedrooms with their toys, and suddenly you heard the doorbell. You went towards the door and opened it, you saw your husband there, suddenly your 8 year old daughter and son, Hanako, Takahashi, hugged Muzan Kibutsuji.