Of all of the Gospel readings in the lectionary, the story of Jesus at the wedding feast has to be one of the most fascinating. If for nothing else, because of the questions it asks but does not answer. If the Jews of Jesus’ time were known for anything, they were known for manners and decorum.
That said, why would Mary tell Jesus that the wedding ran out of wine? What business would it be of hers or Jesus’ if they were only there as guests?