what was madame forestier reaction when the necklace was returned?

From the text:

"You ought to have brought it back sooner; I might have needed it."

"You could have brought it back a little sooner!" exclaimed Madame Forestier when Mme. Loisel went to return the necklace, in a tone that was just a little bit waspish. I could have used it. As her buddy had feared, she didn't open the case.