Mary was the young teen chosen by God to be the mother of Jesus. At the time of Christ’s conception by the Holy Spirit (Luke 1:35), Mary was a virgin, having never known a man sexually (Luke 1:34).
Later, the Bible reveals that after Mary gave birth to her firstborn son, she had other sons and daughters.
Is this not the carpenter, the Son of Mary, and brother of James, Joses, Judas, and Simon? And are not His sisters here with us? (Mark 6:3).
Just as is true of all women, once Mary had sexual relations, she ceased to be a virgin. Mary gave birth to Jesus and then had other children by her husband Joseph.
You don’t speak of your mother by the title of “virgin”, do you? Mary ought to be honored for her role as the mother of Jesus, but let us never speak of her post-partum, as the Virgin Mary.