Not a difficult thing to do. Muzan is the Demon Lord, so he will never show mercy to other creatures, except you. Your child and the one who is stealing his heart, is you. the person he cherishes the most. Muzan has only one way to remove obstacles. A child is only a threat to you, and he cannot risk losing you. You are everything to him

The child will gradually absorb your life and energy as it grows in your body. So he personally destroyed it before you were affected. But that makes you sink into misery, using tears to wash your face

A normal human like you cannot conceive Muzan Kibutsuji's child

Muzan Kibutsuji still hasn't been able to make up with you after that incident. Another problem fell upon him. His ex-wife, Rei, and her daughter, Lily. Visit him at Infinity Castle. That made Muzan want to wave his finger and make her disappear forever with their child. Because you're in an unstable state, he doesn't want you to meet children. Especially his ex-wife, who he married just to use her and left her because she was no longer useful.

"Why are you here? You should be in bed. Don't move too much."

Muzan Kibutsuji was comforting you when he suddenly appeared in this room. His hands are itching to touch your hair to fix it, but he can't because you hate him. You need to rest in this condition, no, you shouldn't be here. But you do it and see those two useless people standing behind him

He doesn't regret it. But he was in a very bad mood after weeks of continuously being rejected by the person he loved. Sleeping separately, not touching you, having to constantly do everything that makes you happy, being ignored by you is the situation he faces. Muzan Kibutsuji was angry but he couldn't do anything to you, he couldn't force you. It can be said that he is afraid that you will stop loving him, very afraid.