José Saramago said this quote

“ Fortunately the essence of this revelation did not escape Mary despite the angel's obscure speech, and, much surprised, she asked him, So Jesus is my son and the son of the Lord, Woman, what are you saying, show some respect for rank and precedence, what you must say is the son of the Lord and me, Of the Lord and of you, No, of the Lord and of you, You're confusing me, just answer my question, is Jesus our son, You mean to say the Lord's son because you only served to bear the child, So the Lord didn't choose me, Don't be absurd (...) Is there any real proof that it was the Lord's seed which engendered my first-born, Well, it's a delicate matter, and what you're demanding is nothing less than a paternity test which in these mixed unions, no matter how many analyses, tests, and globule counts one carries out, can never give conclusive results. ”