(Cont).
This assumption is made purely by desire, and definitively not because of facts, education, or historical accuracy.  The Gospel accounts of the Last Supper make no mention of anyone other than Jesus and the 12 Apostles.  While it's true that the Gospels don't specify that only the 12 Apostles were present, the fact that no others are specified for so sacred and auspicious an occasion certainly indicates exactly that.  Read the Gospel accounts again.  "He sat down with his twelve disciples" makes it pretty clear.  To assume that there were others, including women, goes against the biblical accounts entirely.  Such an assumption does not draw upon biblical accuracy, historical evidence, nor Sacred Tradition; it is based purely on the desire to promote an agenda which contradicts the Bible, history, and Sacred Tradition.