Had
Mary borne other children and had a normal sexual
life,
then ordinary people would have had no surety that
Jesus’
birth occurred before Mary’s being sexually active
and
therefore why believe the stuff about being “over-
shadowed
by the Holy Spirit” for Jesus’ conception and
birth.
There is an appropriateness that the very womb that
bore the Son of God
become man should not bear another. The high
probability of confusion
with the origins, divine or otherwise, and the
propagation of original sin
to other children of Mary or siblings of Jesus would
have persisted perhaps
even to this day and fermented much confusion among
believers.