Read the original prose-fiction excerpt. "Henrietta had invited the pianist to expose him. No provincial prodigy, she believed, could justify the countess's praise. He began with too much force, and Henrietta almost smiled. Then, in the quiet middle passage, he repeated a phrase from the lullaby Henrietta's nurse had sung only in the servants' attic, transforming it into something grave and public. Her intended humiliation returned upon her as recognition." Which event most changes Henrietta's attitude toward the pianist?