How does Monsieur Lhereux, Yonville's linen draper, encourage Emma's extravagant spending habits in the novel, Madame Bovary?

Monsieur Lhereux, Yonville's linen draper, encourages Emma's extravagant spending habits through clever sales tactics. Initially "polite to the point of obsequiousness," Lhereux grovels in front of his customers until he makes a sale. He convinces Emma to purchase expensive items that she cannot afford by preying on her desire for elegance and allowing her to buy on credit. When Emma's bills mount, he demands payment and shows no remorse or consideration for her dilemma.