I basically said yes to Nova at every turn throughout the playthrough (if you turn on the built in walkthrough and choose all of the green options, that'll get you there), and then right near at the end of the update, reward her for the first scene, then punish her for the final scene. It doesn't matter what you choose for the punishment, you get both versions. There are two images associated with that final scene: one for one choice, one for the other but you have to finish on her face. I hope that's what you're looking for