Jesus Was An Asshole

Mary is married to Joseph, who is impotent, which compels Mary to seek pleasure with another man. When she becomes pregnant, she has to come up with a good excuse, otherwise she will be sentenced to death. the only thing she can think of on such short notice is that a god chose her to carry his offspring. The son, Jesus, is told all his life that he is a demigod. He believes it, despite not having any supernatural powers.