What has to be brought up is that you’re quoting a heretical translation.
*porneia *means uncleanness, or in this case fornication, not adultery. Even though it could mean adultery categorically, the Church has not approved that translation.
The Douay reads: “whosoever shall put away his wife, excepting for the cause of fornication, maketh her to commit adultery …”
The RSV-CE has: “whoever divorces his wife, except for unchastity…”
The NAB uses: “whoever divorces his wife (unless the marriage is unlawful) …”
In other words, it’s about a pre-existing condition unknown to one party, not something that happens after they’re married.
AD,
From a paperback i have, “Catholics and Orthodox, can they unite?”, wriitten by Clement C Englert, C.SS.R., copyright 1961,I have gathered that “porneia” is the greek translation of the Hebrew word describing a marriage invalid by Jewish Laws.
Clement Englert uses as his reference the scholarly work by Father J. Bonsirven, S.J., “Le Divorce dans le Nouveau Testament” (Paris 1948) where Father Bonsirven clearly shows that porneia means “concubinage”.
(I am going to paraphrase and shorten some of the arguments the author presents.)
One place to see this is in 1 Cor 5:1 where a man is “reprobated” for marrying his stepmother. Paul uses “porneia” there.
Further, examining the results of the Jerusalem council, we see that one of the things that gentiles were to refrain from was “porneia”. Why would they be required not to be immoral in any case? Wouldn’t that be a given for all races? How would that be infringing on the consciences of Jews, as strangled animals and blood would be?
Lastly, in the epistle to the Hebrews 12:16, Esau was called immoral (pornos) although we find no mention of his sexual sins… However we do know that he married a Hittite woman.
Sounds like a good start to an argument to me!
peace
steve