But fate is unpredictable, and his shot hit the bullseye—Mrs. Yamazaki got pregnant. Shimura Ao was both shocked and elated, because the doctor had told him that due to the low quality of his sperm, it was very difficult for him to conceive a child, and that's why they had no children.
Mrs. Yamazaki's pregnancy finally gave him the chance to be a father and to carry on the Shimura family line, so he did not even think twice about having her keep the child. He even promised to find an opportunity to divorce his wife and then marry her.
However, divorce takes time, and Mrs. Yamazaki needed a nominal father for the child in her womb to cover up the truth, so he introduced her to Yamazaki Katsu.