Zhen Xiu knew the way she tackled the situation was not a good method while dealing with children below the age of five.
She just didn't want to give him false hope as she had in her life once upon a time after all it can give painful memories. It's better to be cautious than hopeful.
"Look! I don't mean it in some other ways. It's just that I am not your mother and it is the truth. We are connected to each other. Yes! I agree but it is just that, whoever told you about the connection being the mother-son relationship was wrong. You are a tree, not a human."
This time she explained very carefully and her softer tone was the evidence that she was not completely indifferent towards the little boy.
The little boy flushed red as he understood the meaning behind her and why she was telling him all these things despite not being his mother. He was not completely dumb that he could not understand the plan of his creator who could not control him.