Spoiler!
She never slep with the brothers. She hate them for what they've done to her when they were younger. She's just leading them on, manipulating them bla bla bla. None of them are blood related to her by the way. She's the daughter of a peace of sh** of a g** and the mother of the girl she possessed back in korea (meaning her and the blond girl who she take the body and vice versa are half sister ). And she sleep with the father of the brothers, the ex priest, friend of her ex husband and a crown prince from another country. Well.. voilà voilà 😁