i1:18 In the Jewish culture the engagement was a prenuptial contract (ketubah), which was entered into before witnesses, that gave legal rights over the girl to the bridegroom. This agreement could only be nullified by going through the formal divorce process. Since the girl still lived with her family, sexual relations were prohibited until after the second event of the public marriage ceremony. This engagement period was usually entered into when the girl turned thirteen. Mary was just a teenager when she gave birth to Jesus.