>>The ONLY PROOF that has ever been offered that the Blessed Mother was not a virgin is other children. Moreover, unless either the husband or wife is infertile, it is nearly impossible for a couple to only one child or no children unless contraception is being used.<<
I agree with everything you said there. And with that, it would be very reasonable to assume, based on everything I read in the bible on the subject, that AFTER Jesus’ birth, Mary and her husband had sex. And, more to the point, there is no evidence whatsoever to suggest they did not. It is actually an extraordinary claim. And extraordinary claims require extraordinary evidence.
By all means cite the verses which indicate this.
And, more to the point, there is no evidence whatsoever to suggest they did not.
Why did Jesus Christ entrust His mother to St. John at the Crucifixion if He had brothers? Why would He violate Jewish tradition in this way?
It is actually an extraordinary claim. And extraordinary claims require extraordinary evidence.
No, it is impossible to prove a negative. YOU would need to prove that the Blessed Virgin Mary had other children.