What the bible says on this point is crystal clear to all but those whose understanding is blinded by their manmade traditions. Mary had other children, Jesus's brothers and sisters. Of course, in order to shore up their extra-biblical, elevated status for His mother, the RC system conveniently perverts the Word of God, claiming His brothers weren't really His "brothers." For some reason, we're supposed to believe they really meant his "cousins" when they said, "Is not this the carpenter's son? Is not His mother called Mary, and His brothers, James and Joseph and Simon and Judas? And His sisters, ..."
Nah, we need the "P"erpetual "V"irginity doctrine because it fits so well with our even more unsupportable doctrines concerning her bodily assumption and her "I"mmaculate "C"onception.
It's a manmade system based entirely upon God's silence and man's perversion of the true Gospel.
Please refer me to any Biblical citation where anyone other than Jesus is referred to as a child of Mary.
SD
It's just like Baptists who first want to be teatotalitarians then have to re-define wine to mean grape juice in those embarassing places where Jesus is drinking and creating it.