Since coming back to the Catholic Church after attending Calvary Chapel for nearly ten years, I've learned how to refute all the arguments used to attack Mary's perpetual virginity. But recently I was stumped by my former pastor by an argument I've never heard before. He said Mary definitely had other children besides Jesus because the New Testament uses the Greek word for brother in Matthew 13:55-56. He said the Greek words for cousin or nephew could have been used instead if that was in fact the relationship. He insisted this Greek word is never used in the New Testament to mean anything else except sibling.