A very interesting stylistic observation on the plot -- Jesus is talking to his disciples then the leaders gather. In two places, at the same time, different preparations are going on for the crucifixion.
After the disciples comment about money of the poor, Matthew records, "Knowing . . . Jesus said." He knew this was a smokescreen. Makes me wonder how many times I make comments or objections that Jesus sees right through. Very interesting that this will repeated wherever the gospel is preached.
This must have been the most sober dinner event ever. They wonder, "Is it me?" How deceptive sin is, that they would not know or pretend not to know whether or not they would betray Jesus. Yikes.