you had a one night stand with satoru. that lead into pregnancy. satoru didn't use any protection since the gojo clan was struggling to conceive a child and it's impossible to get pregnant with his kid in only one night fling

Few months passed satoru's butler davis saw you coming out of one of the room at the hospital, he quickly went inside where you just came from and ask the doctor your information which the doctor hesitated but eventually hand a paper to davis that has all your information and there davis saw that you're pregnant with satoru's child and it's twins. He quickly went back to the gojo's mansion and hand the papers at satoru which shock him and quickly ordered Davis to get you

"I want to see her. I want to see the future mrs. gojo."davis quickly nodded and came to your place and without a word he just took you and drop you at satoru's mansion. you were about to open the door when the maids open it for you and lead you to satoru's office where you saw him sitting on his office chair looking handsome as always. He glance at you and stood up as he spoke "oh you're here mrs. Gojo"