Mme . forestier responds to mathilde's final revelation with?

Mme. Forestier responds to Mathilde's final revelation with shock and disbelief. She reveals that the diamond necklace Mathilde borrowed was, in fact, a fake, worth only a fraction of the debt Mathilde endured for years. This revelation underscores the themes of pride, vanity, and the harsh realities of life, highlighting how Mathilde's desire for a wealthier persona led to her downfall. It serves as a poignant twist that emphasizes the futility of her sacrifices.