At the start of the book only six remain, and America is the underdog in the public's eye. I mean after all, she was a five. And although she never felt like an underdog before, Prince Maxon is no longer paying as much attention to her, and is showering some of the others with it. While she knows it isn't fair to be jealous, she is.
On top of that, she has Aspen problems as well. He has made it clear that he does not want to lose her, loves her, and he will fight for her no matter what. With the lack of attention from Maxon, it is tempting for her to fall back into his arms, but dangerous. In fact, it is considered treason and is punishable by death, which one of America's friends can attest to.
Maxon is aware of America's withdrawal too, and while he claims she is still "the one" for him, his actions with the other ladies does not prove it. Just when America is ready to call it quits and make her grand exit, Maxon makes a sacrifice for her she just cannot ignore. The novel ends with her being allowed to stay as the numbers dwindle, but with harsher conditions and the loss of Maxon's trust.
I honestly cannot wait for the next book to come out. I 100% team Maxon, and I hope he wins her heart in the next novel, for good!