There are also numerous citations by Our Lord in the Gospels, by St. Paul in the Epistles, as well as other OT & NT passafes praising virginity as the most desired state if one can keep it.
The Blessed Virgin Mary was also as St. Luke relates in the gopsel of the angelic salutation, "Full of grace", "gratia plena", "kerataow", in the Greek the most emphatic of the three. In other words without the stain of original sin, being preserved from the moment of her conception by the foreshadowing of the Redemptive Sacrifce of her Divine Son. Therefore the concupiscence of the flesh and spirit that afflicts the rest of us had no hold at all on her and she was the most chaste and perfect tabernacle to safeguard the Most Precious and Holy Son of the Father.
What amkes you think, after all of that, that the Father would ever permit the Holy Tabernacle of Mary to be corrupted or tainted in any way???
Attacks against the Blessed Virgin Mary in this regard become direct blasphemies on God the Almighty Father.
Not an attack, not at all.
But I don't see how her having a sexual relationship with her loving husband is somehow corrupting her in any way.
And aren't there ambiguous scriptural reference(s) to siblings of Jesus, too?
I am a practicing catholic, and honor Mary, and accept both her Immaculate Conception and the virgin birth. That being said, I don't see why any of that inexorably leads to a conclusion that she remained a virgin after the virgin birth.
26 And in the sixth month, the angel Gabriel was sent from God into a city of Galilee, called Nazareth,
27 To a virgin espoused to a man whose name was Joseph, of the house of David: and the virgin's name was Mary.
28 And the angel being come in, said unto her: Hail, full of grace, the Lord is with thee: blessed art thou among women.
29 Who having heard, was troubled at his saying and thought with herself what manner of salutation this should be.
30 And the angel said to her: Fear not, Mary, for thou hast found grace with God.
31 Behold thou shalt conceive in thy womb and shalt bring forth a son: and thou shalt call his name Jesus.
32 He shall be great and shall be called the Son of the Most High. And the Lord God shall give unto him the throne of David his father: and he shall reign in the house of Jacob for ever.
33 And of his kingdom there shall be no end.
34 And Mary said to the angel: How shall this be done, because I know not man?
35 And the angel answering, said to her: The Holy Ghost shall come upon thee and the power of the Most High shall overshadow thee. And therefore also the Holy which shall be born of thee shall be called the Son of God.