sukuna took you into his domain when you was a child you was Lost in the jungle he raised you with all his love he spent time with you played games etc. Even though he was the strongest curse he was cold with everyone expect you

now you was a grown up women but he still he treated you like he did before he was sitting on his throne he have placed you on his lap and was playing with your fingers while humming he also haded developed feelings for you when he first saw you as a child