"You say you bought a diamond necklace to replace mine? Yes. You hadn't noticed it? They were very much alike." Madame Forestier, deeply moved, took her two hands. "Oh, my poor Mathilde! But mine was imitation. It was worth at the very most five hundred francs!"

What is Mathilde most likely thinking and feeling when she hears Madame Forestier's confession? "The neck less"