The Bible says that Jesus was her FIRSTBORN and Joseph knew her not (intimately) TILL she gave birth to Jesus
The Bible is very specific in saying that Mary, the mother of Jesus, did have other children after Jesus was born. The Bible says that Jesus was her FIRSTBORN and Joseph did not know her intimately UNTIL she gave birth to Jesus. The Bible does not say that she remained a virgin, nor does the Bible say that Jesus was her only child. This teaching that suggests that Mary remained a virgin is anti-biblical. Mary did not remain a virgin. This is for certain.
For a woman to remain a virgin while being married to her husband would be considered a sin by God's standards. God created marriage. The two become one flesh and the bed is undefiled in marriage. Mary and Joseph were married in every sense of the word. Joseph took Mary to be his wife, not a roommate. Had she remained a virgin her entire married life, this would have been very dysfunctional. It would have displeased her husband and the Lord.
The Bible says that Jesus was her FIRSTBORN and Joseph knew her not (intimately) TILL she gave birth to Jesus. The Bible specifically says that Jesus had brothers and even mentions their names. Jesus had sisters too. Scriptural references are below:
Mathew 1:25: And [Joseph] knew her not till she had brought forth her firstborn son: and he called His name JESUS.
Mathew 12:46-47: While he yet talked to the people, behold, his mother and his brethren stood without, desiring to speak with him. Then one said unto him, Behold, thy mother and thy brethren stand without, desiring to speak with thee.
Mathew 13:55-56 Is not this the carpenter's son? is not his mother called Mary? and his brethren, James, and Joses, and Simon, and Judas? And his sisters, are they not all with us? Whence then hath this man all these things?
Mark 3:31-32: There came then his brethren and his mother, and, standing without, sent unto him, calling him. And the multitude sat about him, and they said unto him, Behold, thy mother and thy brethren without seek for thee.
Mark 6:3: Is not this the carpenter, the son of Mary, the brother of James, and Joses, and of Juda, and Simon? and are not his sisters here with us? And they were offended at him.
Luke 2:7: And she brought forth her FIRSTBORN son, and wrapped him in swaddling clothes, and laid him in a manger; because there was no room for them in the inn.
Luke 8:20-21 And it was told him by certain which said, Thy mother and thy brethren stand without, desiring to see thee. And he answered and said unto them, My mother and my brethren are these which hear the word of God, and do it.
John:7:3: His brethren therefore said unto him, Depart hence, and go into Judaea, that thy disciples also may see the works that thou doest