When Ian arrived, he and Maxine exchanged embarrassed grins and resumed their romance. They split up in the final episode of season 7 because she didn't trust Ian not to be drawn to guys again, and Maxine hasn't been seen since. It's possible they reunite after everything that has happened. No, they don't stay together. In the final episode "Exit Strategy", it is revealed that Maxine knows about Ian's secret identity as Batman and feels guilty about this. She decides to leave town to start a new life without Ian. When asked if they stayed together at the end of the episode, David Fury said no. He also said there were no plans for another season anyway so it doesn't matter. However, earlier in the year, Fox ordered more episodes. So it's possible they will reunite in the future.