My strongest suspicion was that Amber and her bedbugs never left Joplin.
Wherever she is she has a strong hate on for Crystal Naydean.
Amber was innocently freeloading in Crystal's government trailer, and Crystal had the nerve, the unmitigated gall, to complain about Amber infesting the place with bedbugs.
And Annette isn't much better, bragging about her big money move from Wendy's to a career at Popeye's.
Amber was on a fast track to success at the convenient store, learning to count change and load forties into the cooler, but those sisters were just too much to "bare".