Descent from the Upper Class

So far I've read up to about page 106 in The House of Mirth by Edith Wharton.  I've stopped to write a blog because I've realized that there has been a significant change in the general course of the story.  In the last few chapters, things have not been going in Lily's favor.  It seems that her lack of money has started to catch up with her and her descent from the upper class has begun.  Multiple characters (for example: Bertha Dorset, Grace Stepney, and Mrs. Peniston) have all become angry at Lily.    On page 106, there was a sentence that read "She knew, moreover, that if the ladies at Bellomont permitted themselves to criticize her friends openly, it was a proof that they were not afraid of subjecting her to the same treatment behind her back."  This line shows how the whole of the upper class has begun to side against Miss Bart.  This change seems to mark the development of the theme for the story.  Because of Lily's desire for wealth, she has made certain friendships and decisions that would aid her in that quest.  However, these same relationships and decisions are causing her to lose popularity among the upper class, and she is beginning to fall out of her circle of friends.  She may never be able to get the riches she desires.  I believe this may mean that the theme is that the values of society, mainly wealth, can cause a person to lose what is important in life, in this case, Lily's friendships.  I think this theme will continue to be developed in the rest of the story and Lily's life will progressively get worse.