Why does Juan look disappointed when his mother tells him she doesn' t need him to thread a new needle?

Juan likely feels disappointed because he was eager to help his mother and contribute to a task that he may have seen as important or meaningful. His desire to assist could stem from a need for connection or validation from her. When she dismisses his offer, it may leave him feeling undervalued or excluded from the shared activity. This moment highlights his longing for involvement and recognition.