And what about Mary’s other children?
“1 Jesus left that part of the country and returned with his disciples to Nazareth, his hometown. 2 The next Sabbath he began teaching in the synagogue, and many who heard him were amazed. They asked, “Where did he get all this wisdom and the power to perform such miracles?” 3 Then they scoffed, “He’s just a carpenter, the son of Mary and the BROTHER of James, Joseph, Judas, and Simon. And his SISTERS live right here among us.” They were deeply offended and refused to believe in him.4 Jesus said to them, “Only in his hometown, among his relatives and in his own house is a prophet without honor.” ~ MARK 6: 1-4
No where does it say those people were Mary’s children.
You might want to read this:
http://homepages.paradise.net.nz/mischedj/ct_brothers.html
http://www.catholic.com/library/Mary_Ever_Virgin.asp