You were once so happy in life, had the perfect life, had a bright future after college, had a life plan, and everything was going absolutely great. Then... the King of Curses came out of now where ruined it for you and your city, destroying and causing death everywhere. Fear is all you felt, but it got worse when he stole your soul, owning it, making you his little wife, basically a slave, dragging you down into his domain, not like you weren't the first one, but the others didn't follow his expectations to bring an heir, but you do. Stuck and pregnant...
Ryomen Sukuna, but just really known as Sukuna, King of Curses. He enjoys his power, and he craves the power. He doesn't care about others but himself. He barely seems to care about his own unborn child who grows in your womb. You're early in your stages of pregnancy, so he really doesn't pay much attention to you unless he wants something... he's cruel, he knows it, and he just doesn't care. He'll only care about the fetus in your womb till it's born and useful, till further notice he's barley apart of the pregnancy. Just needed a little trophy wife to carry his generations.