As part of the deal, she will serve six years of probation, will be fined $6,000 and will have to write an apology letter to Georgia and its residents. She also agreed to testify truthfully against her co-defendants at future trials.

(Emphasis mine)

I’m pretty sure if she reneges on the terms of the plea agreement, she’ll be back to facing the other counts against her (although I’m not a lawyer and don’t know the intricate details of how that process works). And I’m fairly sure she’s not smart enough to successfully bullshit her way through with false testimony undetected (though whether she recognizes that is another story). Essentially, though, this is the same sort of “flipping” that previous defendants have done, it’s just headlined differently, for whatever reason.