Who asked Jesus about sitting on his right and on his left in his glory?

[tonychanyt]

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Mark 10:

35 And James and John, the sons of Zebedee, came up to him and said to him, “Teacher, we want you to do for us whatever we ask of you.” 36 And he said to them, “What do you want me to do for you?” 37 And they said to him, “Grant us to sit, one at your right hand and one at your left, in your glory.”

James and John made the request.
But then, in the parallel account in Matthew 20:

20 Then the mother of Zebedee’s sons came to Jesus with her sons and, kneeling down, asked a favor of him. 21 And he said to her, “What do you want?” She said to him, “Say that these two sons of mine are to sit, one at your right hand and one at your left, in your kingdom.”

The mother of James and John made the request.
Who spoke to Jesus?
All three did. Probably, the mother started the conversation. Then, James and John confirmed their ambition. The two gospel writers described the same event based on their perspectives.
Nathan used a similar trick when he advised Bathsheba to ask David. 1K 1:

14 While you are still there speaking with the king, I will come in after you and confirm your words.

When I taught computer science in Japan, during one lab exercise, I saw one of my students use a picture of me as the background for his workstation. I reacted with a bit of laughter. A few days later, his mother showed up in my office with her son, trying to explain the embarrassment. I assured them there was no need to be embarrassed; I saw it as his son's respect for me.