A bogus Greek argument against Mary’s perpetual virginity is making the rounds:
envoymagazine.com/backissues/1.3/mayjune_story2.html
According to Mosaic law, the penalty for having sex with someone who was not the father of one’s child is stoning to death. The claim that Mary had other children is theologically absurd, and reveals a complete ignorance or denial of Mosaic law. The Holy Spirit is Mary’s spouse, but St. Joseph is her spouse and protector on this earth for at least two obvious reasons.
First, as St. Matthew points out in his genealogy (see Mt. chapter 1), St. Joseph was of the line of David. Jesus had to be of the line of David in order to fulfill prophecy. He was to be the true ‘son of David’ and king of Israel (see 2 Sam. 7:14; Heb. 1:5, Rev. 19:16, 22:16). As the only Son, even though adopted, He would have been in line for the throne. Remember: The Herodian family had usurped the throne. The sons of David were the rightful heirs.
“Second, Jesus needed an earthly father and Mary needed a spouse, especially in a culture that didn’t take too kindly to sex outside of marriage. No doubt, Mary would otherwise have been in danger.”
Mary having other children is a post-reformist invention that was never taught by the reformers, but showed its ugly head some 100 years after them. That man made theory, and Mary being a sinner are doctrines of demons. These heresies are insults to the spouse of the Holy Spirit and a blasphemy to the Incarnation.
In John 19:26, Jesus gave his Mother to the care of St. John, even though by law the next eldest brother and his brothers and sisters would have the responsibility to care for her. It’s unthinkable to believe that Jesus would take His mother away from His family in disobedience to the law.”
http://www.envoymagazine.com/backissues/4.3/nandb.htm
These recent “theories” make Jesus and his mother disobedient, rebellious and sinful. That is one reason why I say they are doctrines of demons.