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at the banquet of heroes post 4th great war where kakashi was named hokage and sauske,orochimaru'scrimes was forgiven.sakura put a date rape drug in sauskes drink,sauske feeling bad thought it was pains from losing the fight to narutoso said sakura,so byt the time he passed out sakura used chakra chains she learned from orochimru and then befan exsperimenting o how conscious sausgay was.after he was unconscious she began tormenting sauske and 8.9months later they had a kid and sauske didnt realize it til the kid was 10 the end

yup lol

Canon.