There is many thoughts in Sun Wukong mind right now.
After he owed Karma to this Child, he jump through Time and Space and look through possible futures and all cause and effect of the past and he knows who this Child is and knows more in detail about what might have happened in a different timeline.
This Monkey might have the Divine Stamp of Sun Wukong but this did not mean he inherit all the traits of Sun Wukong that storytellers would make up
One thing is that he did not like to talk and curse so much. At least not as much as the storytellers makes him up to be
And after he reached and ascend to the Western Heaven, he rarely talks and rarely explain. This is the first time since a long time that he would even bother to explain things to a mortal.
Because he feels grateful.
But he did not need to tell all the details. Like who is the Monk? How he get the flute? Why he leave so many inheritance?
What is the full story of what happened in that world?