What effect does Madame Defarge have on Lucie when the Defarges visit Lucie's apartment?Charles Dickens's A Tale of Two Cities

In Book the Third of A Tale of Two
Cities, Lucie arrives in Paris and Mr. Lorry decides that she must stay in an
apartment so as to not compromise Tellson's Bank as haboring the wife of a prisoner of
LaForce.  When Defarge brings a note for Mr. Lorry from Dr. Manette, Mr. Lorry takes
Lucie and her child with him.  The Defarges accompany him, with Madame Defarge insisting
that she be able to recognize their faces for "their
safety." 

When they arrive at the apartment, Lucie is
alone, crying.  Lucie mistakenly believes thatMadame Defarge, who
symbolically recommences her kinitting, is an angel of mercy.  Kissing "the hand that
knits," she begs her to be merciful to her husband, yet there is so much coldness in the
hand that she kisses that Lucie is given "a check."  Madame Defarge's only reply to
Lucie is an impassive stare and these words, “is it likely that the trouble of one wife
and mother would be much to us now?”

After the Defarges
leave, Lucie says, “That dreadful woman seems to have thrown a shadow on me and on all
my hopes.” And, although Mr. Lorry tries to reassure Lucie,“in his secret mind,” he is
extremely worried. Certainly, it is at this crucial point in the plot that the sinister
Madame Defarge has virtually invaded Lucie's psychological space as well as her physical
space.  For, not only has she ascertained where Lucie dwells, Madame Defarge also has
caused Lucie great consternation and discomfiture.