FTP, name this novel about Undine Spragg, a work by Edith Wharton.
In this novel's final pages, the protagonist's son Paul starts crying and is comforted by his new stepfather Elmer, who has just purchased some tapestries from his wife's previous husband.  Paul came to live with his mother in France after his birth father, Ralph Marvell, shot himself in the head, making it easier for his mother to marry a French aristocrat.  The protagonist moves from the Western city of Apex to New York, where her parents indulge her every whim, mainly by buying her endless dresses.  FTP, name this novel about Undine Spragg, a work by Edith Wharton.
In this novel's final pages, the protagonist's son Paul starts crying and is comforted by his new stepfather Elmer, who has just purchased some tapestries from his wife's previous husband.  
The Custom of the Country