No it wasn't! You just ignored what is said in "bold" here:
"Now Jesus Christ's birth was thus: At the espousal of His mother, Mary, to Joseph, ere their coming together, she was found pregnant by holy spirit. Now Joseph, her husband, being just and not willing to hold her up to infamy, intended covertly to dismiss her. Now at his brooding over these things, lo! a messenger of the Lord appeared to him in a trance, saying, "Joseph, son of David, you may not be afraid to accept Miriam, your wife, for that which is being generated in her is of holy spirit" (Mt.1:18-20).
Why did Joseph consider dismissing Mary if he was the real father of the Lord Jesus?
Matthew 1: 18 to 23; 18 This was how the birth of Jesus Christ took place. His mother Mary was engaged to Joseph, but before they were married, she found out that she was going to have a baby by the Holy Spirit. 19Joseph was a man who always did what was right, but he did not want to disgrace Mary publicly; so he made plans to break the engagement privately. 20While he was thinking about this, an angel of the Lord appeared to him in a dream and said, “Joseph, descendant of David, do not be afraid to take Mary to be your wife. For it is by the Holy Spirit that she has conceived. 21She will have a son, and you will name him Jesus — because he will save his people from their sins.” 22Now all this happened in order to make what the Lord had said through the prophet come true, 23“A virgin will become pregnant and have a son, and he will be called Immanuel” (which means, “God is with us”).
Now we know that is a deliberate lie. The majority of churches have now been forced to accept that the Lord, through his prophet Isaiah, never did say that a virgin was pregnant.
Isaiah Used the Hebrew word 'Almah,' which in no way can be translated as virgin, for the Hebrew have a term for virgin, which is 'Bethulah,' the word that is used in every instance in the old Testament when a woman who has never had sexual intercourse with a man Is referred to and the word that Isaiah would have used if the Lord intended him to convey the message that a virgin would be pregnant.
Isaiah 7: 14; Correct Jewish Translation: Therefore, the Lord, of His own, shall give you a sign; behold, the "YOUNG WOMAN" is with child, and she shall bear a son, and she shall call his name Immanuel.
Isaiah 7: 14; Erroneous KJV Translation: Therefore the Lord Himself will give you a sign: Behold, "THE VIRGIN" shall conceive and bear a Son, and shall call His name Immanuel.
In 1973, an ecumenical edition of RSV was approved by both Protestant and Catholic hierarchies, called the common bible. As a matter of fact, I have in front of me, A New English Translation of the Bible, published in 1970 and approved by the council of churches in England, Scotland, Wales, the Irish council of churches, the London Society of Friends, and the Methodist and Presbyterian churches of England. And there in the RSV we read in Isaiah 7: 14; "A young Woman is with child, and she will bear a son." I also have before me The Good News Bible, catholic Study Edition, with imprimatur by Archbishop John Whealon: and on turning to Isaiah 7: 14; It says here, "A young woman who is pregnant will have a son, etc."
But even after admitting that the prophet Isaiah never did say that a virgin would conceive etc, but rather, "A YOUNG WOMAN" who is pregnant will have a son," in Matthew 1: 22; concerning the birth of the child Jesus, "Now all this happened in order to make come true what the Lord had said through the prophet (Isaiah)" they here claim that he said a virgin who is pregnant, which obviously he didn't.
In translating the Hebrew words of the prophet Isaiah, that an "Almah" an "unmarried female" is with child and will bear a son," into Greek, which unlike the Hebrew language, does not have a specific term for "virgin," the authors of the Septuagint and Matthew correctly used the Greek word "Parthenos," which carries a basic meaning of "girl," or unmarried youth, and denotes "virgin" only by implication.
Joseph ben Jacob, who married the already pregnant Mary and who had no sexual relations with her until after she had given birth to Jesus, the first of her sons, was only the step father to Jesus. The biological father of Jesus, was Joseph the son of Alexander Helios/Heli, who was the half brother to Mary, who was also sired by Heli.
Like Jesus who was born of the promise of God and born of the power of the Holy Spirit, so too was Isaac, and we read in Galatians 4: 29; Amplified version; "Yet at that time, the child born according to the flesh (Ishmael) despised and persecuted him (Isaac) who was born according to the promise and the workings/power of the Holy Spirit.
Like Jesus, Isaac was also born of a brother-sister relationship, Abraham and Sarah, having both been sired by Terah, from different mothers.