I'm quite familiar with that fakery. It's a Gnostic version written long after the Apostles left this earth. Your argument is that Mary wasn't a virgin (as per your argument's claim as to the meaning thereof); while the Doctrine of the true Scriptures demand she have been a virgin else Christ would have been a bastard child. If He were a bastard child, then He wouldn't have fulfilled the Law, and His people would still be in their sins, and subject to the Father's wrath. Your adopted version denies the Gospel therefore.