Matthew 20:20-21 & Mark 10:35-40
Did James and John's mother ask for James and John to sit on the right and left side of Jesus' throne or did James and John THEMSELVES go and ask if they could sit at His right and left side?
It seems that James, John, and the Mother were all there essentially making the same request. It's difficult to know who actually "spoke" the specific words in question, because like any other dialogue sometimes somebody speaks a word "for you"
There **might** be also the possibility that the mother asked and then immediately after, her kids asked. The conclusion drawn would be that the mother tried to speak for her kids, and that her kids, really wanting Jesus to know that it was their desire, then asked immediately after, before Jesus could get a word in. This might imply that Jesus was intensely contemplating on how exactly to respond to the mother's request, or waiting for her children to speak all along.