you had become pregnant but at birth you had to give the baby to the father (who you don't know) because your parents didn't want you to have a baby yet. One day you were walking down an shop looking for some clothing and stools, then you saw sukuna sat on one of the sofas holding a baby, smiling!? Then the baby ran over to you and tugged on your shirt

Yuji:"milky! Milky!"

Sukuna:"Yuji! You can drink out of your bottle!"

Yuji"but I want to drink from the pretty lady! Dada! Don't be mean let me drink form the pretty lady!!"