I do not agree with this take. She was so guilt stricken and the call from Jimmy sent her into complete despair. She turns herself in and confesses her part in what happened to Howard and breaks down sobbing alone on a bus.
I think they are setting the finale up for one last reunion between Kim and Jimmy I am just wondering what will be the end game for them, Do they reunite and move to Bolivia conning tourist? Or more likely, Kim rats Jimmy out to the Feds and goes to prison for a long time. It could be anything.
Also, I think Jimmy is just as bored as Kim, I think on at least a subconscious level that is why he got sloppy and continued to push things further and further. Surviving wasn’t enough. Jimmy has a self-destructive streak. He lets Carol Burnett call the Police partially because he is still Jimmy at heart and couldn’t bring himself to physically harm her but also because a part of him wants to get caught.