Reply Obj. 4: The sentence of adulteresses according to the Law was that they should be stoned, not only if they were already espoused or married, but also if their maidenhood were still under the protection of the paternal roof, until the day when they enter the married state. Thus it is written (Deut. 22:20, 21): "If . . . virginity be not found in the damsel . . . the men of the city shall stone her to death, and she shall die; because she hath done a wicked thing in Israel, to play the whore in her father's house."
It may also be said, according to some writers, that the Blessed Virgin was of the family or kindred of Aaron, so that she was related to Elizabeth, as we are told (Luke 1:36). Now a virgin of the priestly tribe was condemned to death for whoredom; for we read (Lev. 21:9): "If the daughter of a priest be taken in whoredom, and dishonor the name of her father, she shall be burnt with fire."
Lastly, some understand the passage of Jerome to refer to the throwing of stones by ill-fame. _______________________
SECOND ARTICLE [III, Q. 29, Art. 2]
Whether there was a true marriage between Mary and Joseph?
Objection 1: It would seem that there was no true marriage between Mary and Joseph. For Jerome says against Helvidius that Joseph "was Mary's guardian rather than her husband." But if this was a true marriage, Joseph was truly her husband. Therefore there was no true marriage between Mary and Joseph.
Obj. 2: Further, on Matt. 1:16: "Jacob begot Joseph the husband of Mary," Jerome says: "When thou readest 'husband' suspect not a marriage; but remember that Scripture is wont to speak of those who are betrothed as husband and wife." But a true marriage is not effected by the betrothal, but by the wedding. Therefore, there was no true marriage between the Blessed Virgin and Joseph.
Obj. 3: Further, it is written (Matt. 1:19): "Joseph, her husband, being a just man, and not willing to take her away [*Douay: 'publicly to expose her'], i.e. to take her to his home in order to cohabit with her, was minded to put her away privately, i.e. to postpone the wedding," as Remigius [*Cf. Catena Aurea in Matth.] expounds. Therefore, it seems that, as the wedding was not yet solemnized, there was no true marriage: especially since, after the marriage contract, no one can lawfully put his wife away.
On the contrary, Augustine says (De Consensu Evang. ii): "It cannot be allowed that the evangelist thought that Joseph ought to sever his union with Mary" (since he said that Joseph was Mary's husband) "on the ground that in giving birth to Christ, she had not conceived of him, but remained a virgin. For by this example the faithful are taught that if after marriage they remain continent by mutual consent, their union is still and is rightly called marriage, even without intercourse of the sexes."
I answer that, Marriage or wedlock is said to be true by reason of its attaining its perfection. Now perfection of anything is twofold; first, and second. The first perfection of a thing consists in its very form, from which it receives its species; while the second perfection of a thing consists in its operation, by which in some way a thing attains its end. Now the form of matrimony consists in a certain inseparable union of souls, by which husband and wife are pledged by a bond of mutual affection that cannot be sundered. And the end of matrimony is the begetting and upbringing of children: the first of which is attained by conjugal intercourse; the second by the other duties of husband and wife, by which they help one another in rearing their offspring.