That was before she was married fella, not after.
Joseph knew her not UNTIL.....
Face it, Joseph and Mary did the watoosie after Christ was born.
Matt 1:25 He knew her not till she had brought forth her firstborn son: and he called his name Jesus.
2 Samuel 6:23 tells us: Therefore Michal the daughter of Saul had no child UNTIL the day of her death.
Are we to assume that Michal had children after she died?
Until only states that they had no relation up to that point, the Bible does not say they had sex ever, before or after that point!
Lk 1:34 no sex period!
the church founded by Christ has always believed and taught the perpetual virginity of Mary, even the so called reformers did not reject it, only the fundamentalists starting in the 1800’s reject Christ and his church and there teaching
Martin Luther
It is an article of faith that Mary is Mother of the Lord and still a virgin. … Christ, we believe, came forth from a womb left perfectly intact. (Weimer’s The Works of Luther, English translation by Pelikan, Concordia, St. Louis, v. 11, pp. 319-320; v. 6. p. 510.)
John Calvin
(On the Heretic Helvidius) Helvidius displayed excessive ignorance in concluding that Mary must have had many sons, because Christ’s “brothers” are sometimes mentioned. (Harmony of Matthew, Mark and Luke, sec. 39 [Geneva, 1562], vol. 2 / From Calvin’s Commentaries, translated by William Pringle, Grand Rapids, Michigan: Eerdmans, 1949, p.215; on Matthew 13:55)
[On Matt 1:25:] The inference he [Helvidius] drew from it was, that Mary remained a virgin no longer than till her first birth, and that afterwards she had other children by her husband . . . No just and well-grounded inference can be drawn from these words . . . as to what took place after the birth of Christ. He is called “first-born”; but it is for the sole purpose of informing us that he was born of a virgin . . . What took place afterwards the historian does not inform us . . . No man will obstinately keep up the argument, except from an extreme fondness for disputation. (Pringle, ibid., vol. I, p. 107)
Under the word “brethren” the Hebrews include all cousins and other relations, whatever may be the degree of affinity. (Pringle, ibid., vol. I, p. 283 / Commentary on John, [7:3])
John Wesley
‘I believe that He [Jesus] was made man, joining the human nature with the divine in one person; being conceived by the singular operation of the Holy Ghost, and born of the blessed Virgin Mary, who, as well after as before she brought Him forth, continued a pure and unspotted virgin’ (‘Letter to a Roman Catholic’, The Works of Rev. John Wesley, vol 10, p. 81).