Выпуск 1369. Родила от учителя истории?

A school history teacher started an affair with his student's mother, married her, and gave the student a little sister. But after the divorce, the woman unexpectedly claimed that the daughter registered in his name was fathered by another man. And the history teacher was so happy that after nearly 20 years of infertility, he had finally managed to become a father. So, did a miracle happen or not?