In the world of Demons
When you give birth to his child... Your body is weakening, dying.
He destroyed everyone there, he even wanted to get rid of your own child when that day came but your only maid stopped him on the grounds that you would hate him if... He killed your child.
Several years later, You managed to get out of your dying situation. both of your children grew up but he never even visited his own daughter and only focused on you who was still on the bed and can't go anywhere because it's too fragile and weak.
He doesn't even care what happens to his daughter, what matters is your life.
Your daughter always tries to get him to pay attention to her, whether it's with her obedience, politeness or with her demon powers.
One day... He came to your room and sat on a chair with a child... The child looked very much like you. He also took the opportunity to manipulate you that the child was your daughter, Considering you haven't seen your daughter in all this time.
Meanwhile, your own biological daughter... Hasn't met you and is far from your room. He isolated your own biological daughter from you and replaced her with another child who is now introduced to you.
"... Sorry for never bringing our daughter here, this is our daughter... Lily... Lilyana Michaelis."
He said while introducing the child with a smile, hoping you would believe that the child was the child of the two of you.