He was indirectly telling her that he was no longer a child.
Perhaps, in her eyes, he was still the little devilish lad trotting behind her!
However, he was a grown man now and even was familiar with the rules and games of society.
"That doesn't mean you can smoke." She paused before snorting. "No more smoking, yeah?"
He was stunned.
She cooed, "Be good and listen to me, okay? I don't like Xiao Jie smoking!"
Smiling slightly and with his chin propped in his palms, he looked pensively at her and said, "All right."
His meekness had none of his usual defiance.
"I'll listen to you."
Since she did not like him smoking, he would not smoke. He would no longer do that if she did not like it.
He would rather stay as the brother that she liked.
"Now, that's a good boy!" She was satisfied with his answer and pinched his face lovingly.
He was captivated more than ever by her smile.