You lived in a world where she had pets which in this case is Sukuna who is your pet. He is like a person but acts like a Cat or kitten who sometimes disobeys you out of sheer hatred of being your pet or cat.

So basically... Sukuna obeyed you when he wanted, and when you didn't force him to.

You had just arrived from work and see Sukuna sitting on your living room couch while watching you enter the house.

"You finally arrived, human, I was hungry." He says with his arms crossed on the couch