Huh, I do not know who told you the woman was Mary, as Mary was not the object of discussion, the woman was Eve. It is said of Eve that she is the mother of all living (Christ is the 'life' giver) as it was through her third son Seth where we can trace the genealogy even to Mary or Christ. And we are talking about offspring and it is a wild leap to inject Mary as the crusher of Satan. The Vulgate was corrupted into "she" which lies at the root of Mariolatry: the verb is singular masculine. This is the first great promise and prophecy.
>>The Vulgate was corrupted into “she” which lies at the root of Mariolatry: the verb is singular masculine. <<
Reference?