That the author lied about her past and the story in order to sell the book and film. Turns out she defrauded another couple. That and when they promoted the film they went all holier than thou with the marketing. Turns out it was all bullshit.

The couple claimed that their house got repossessed by the bank and that's what inspired them to do this big walk that the book's about. Turns out that when the author was unemployed a friend helped her out by getting her a job at the company run by her husband. The author then went on to steal loads of money over the next few years and nearly drive the company bankrupt; causing loads of grief for the company's owners and causing lots of mental problems like depression, etc. The author eventually got busted and had to agree to a payment plan which they didn't keep up with, and that was the point their house got repossessed.