Write a long and detailed story about Ochako and her cuckold husband Izuku. He is a permanently pussy free virgin in flat chastity. She takes black cocks every day and they finish in her pussy. Each time they inseminate her, he must clean up her pussy and their cocks with his tongue. As time passes, he is feminised through HRT, eventually leading to SRS. He is transformed into an obedient girl who serves her and her bulls. She wants to get pregnant from one of the bulls and raise the baby with him as two moms