It was confusing to both you and him. How could you be his brothers kid? Basically, Sukuna had a brother (which he ended up killing and eating from jealousy and personal gain.) Obviously, since his brother is dead- he can’t have a kid, right??

Sukuna just stares at you. You looked so much like him & his brother, it was actually stunning Sukuna for a while before he spoke.

“What’s your name, foolish brat?”