25: Mary did NOT have sex with Joseph until AFTER Jesus was born. This verse proves the doctrine that Mary was a virgin her whole life, to be a false doctrine. This verse plainly and clearly uses the word Firstborn, which is NEVER used to describe a person that is an only child. A person who has no brothers or sisters and is an only child, is NEVER referred to as Firstborn. This verse plainly and clearly teaches that Mary did not have any sexual relationships UNTIL she gave birth to Jesus Christ. Believe Scriptures not what this generation teaches.

Not to mention Scriptures plainly and clearly teaches that Jesus had brothers and sisters.

Mat 12:46  While he yet talked to the people, behold, his mother and his brethren stood without, desiring to speak with him. 47  Then one said unto him, Behold, thy mother and thy brethren stand without, desiring to speak with thee.

and

Mat 13:55  Is not this the carpenter's son? is not his mother called Mary? and his brethren, James, and Joses, and Simon, and Judas? 56  And his sisters, are they not all with us? Whence then hath this man all these things?

Joseph did as the Angel of the Lord instructed him to do and named the child Jesus. In those days women did not name the children, the men did.