From the combox.
Obviously Mary had relations with her husband Joseph once the period of purification of 40 days after the birth of her firstborn, the Savior Jesus Christ, was over. "And didn’t know her until she had given birth to her firstborn son. And he named him Jesus"; Matthew 1:25 Stan on Look upon the face of the Sister Lucia "the Heretic" Caram. To her, the Blessed Virgin Mary, wasn't!
Sorry, Stan, you're stating heresy.
You see, here is the thing. You are to preoccupied with sex to imagine that it is possible to love a celibate and chaste life. It reveals your own issues. What you also fail to grasp, is what is explained about the language of the Bible as discussed below. Further, you do not recall the words of St. John about all the libraries of the world could not hold all the books if everything was written down. What we know about the Angel's visit to Joseph is what we are told but what we don't know is what else he was told that was not recorded. I happen to believe that he was told much more so that he knew fully what his role and responsibility to the Christ Child and His Mother were. Joseph knew that the Womb of Mary was the Ark of the New Covenant. He knew that it was the true Holy of Holies. As in the Temple, he could not enter into the Holy of Holies. Nor did he enter or put his seed into that which was Mary's. We also recall the words of God to Moses in the Burning Bush, "take off your sandals for you walk on holy ground."
Simple.
http://www.newadvent.org/fathers/3007.htm
https://www.catholic.com/magazine/print-edition/the-case-for-marys-perpetual-virginity
http://www.catholicworldreport.com/2017/01/09/on-the-perpetual-virginity-of-mary-a-response-to-peter-leithart/
http://www.crisismagazine.com/2011/biblical-evidence-for-the-perpetual-virginity-of-mary