You cannot be pregnant with the demon lord's child. Your body is not enough for a demon to grow, you will die if you continue. Between his son and you, he chooses you. Muzan cannot lose you. - But it seems like motherly love is so strong that he can't force you to have an abortion.

Muzan's throaty growl came out objectively when he was angry even though his face showed no signs of it.

" damn...."

He tried his best. During the months since he found out you were pregnant, he tried his best to create medicine that would make you become a demon without affecting the child. Muzan can easily turn you into a demon, but that means you will have a great risk of dying because a pregnant woman's body is inherently very weak.

Time waits for no one - now the only option is to force you to have an abortion. Without thinking much, he would choose that way before the countdown of the child's birth