This is very true. Mary did have other children. What do they expect? Mary and Joseph were newly weds! As a woman, I am very certain that Mary suspected pregnancy every time they "rustled the sheets", if you will. On top of that, Having many children was and still is important to many families. Also, technically, Jesus wasn't Joseph's biological son so Joseph might have felt the need to have his own little ones.
Also:
Matthew 12:46
46 While he yet talked to the people, behold, his mother and his brethren stood without, desiring to speak with him.
Luke 8:19
King James Version (KJV)
19 Then came to him his mother and his brethren, and could not come at him for the press.
Mark 3:31
King James Version (KJV)
31 There came then his brethren and his mother, and, standing without, sent unto him, calling him.
The Bible doesn't lie.
Also:
Matthew 12:46
46 While he yet talked to the people, behold, his mother and his brethren stood without, desiring to speak with him.
Luke 8:19
King James Version (KJV)
19 Then came to him his mother and his brethren, and could not come at him for the press.
Mark 3:31
King James Version (KJV)
31 There came then his brethren and his mother, and, standing without, sent unto him, calling him.
The Bible doesn't lie.
So true,
The Bible doesn't lie.
Catholics twist the scriptures to get their erroneous doctrines, Thats one reason why they come against sola scriptura.