Wouldn't that mean that the Dad is saving his jinx daughter for his son? That's incest.

I think it is unfair to say this manhwa as incest since there are many things that are yet to be unfold.

However,this is my theory for non incest jinx relationship

To continue the jinx lineage, he'll can easily use other men's sperm to avoid incest.

however the Dad will make sure his heir will be the first person to touch every jinx.
So no incest involve at all?
Totally ignore this conspiracy if it sound ridiculous.
Hehehe (づ￣ ³￣)づ

This manhwa is very interesting~
Let's see how the story goes~

Well, it seems like the daughter never left the room. She knows nothing of the outside world, whereas her mother knew a little bit. And notice how dead she looked whenever she saw the President. To me, the daughter may have been born from rape due to her mother's real lack of emotions and light from her eyes, which always suggest a broken character in a manga or anime.

True~ kinda reminded me of the movie ''Room'. I hate that kind of situation

Yeah, That's what I think as well.