Marriage is, if I may say so, a conditional, a contingent sacrament.

The priest blesses an event beforehand; it is evident that if the act is not consummated the benediction remains without effect.

That is obvious.

I have known on earth, in the town of Antrim, a rich man named Sadoc, who, living in concubinage with a woman, caused her to be the mother of nine children.
In his old age, yielding to my reproofs, he consented to marry her, and I blessed their union.

Unfortunately Sadoc's great age prevented him from consummating the marriage.