Only the artist knows for sure. Since the Eucharistic Prayer I (opposite) encompasses Last Supper, Calvary, and Resurrection, "dying you destroyed our death, rising you restored our life . . .  eat this bread and drink this cup . . . . until you come in glory" maybe the illustration reflects all that, including the glory. As for the bread, there is a round bread-colored object between her wrists, below and adjacent to the cup-like object. Maybe next time you are in church take a magnifying glass and peek at it (with permission of course), and let me know? The scene is compatible with the history of Christian art where a Mary is not passive, but rather raising her hand or hands in some way next to the cross (in a few examples I found). Recall that the Magdalene was also at the cross, although of course officially, the illustration would have to be a portrayal of the mother. The illustration is very sophisticated art and I wish I had access to a clear copy of it online and an explanation