yep, if it said pillow talk not defined, you somehow used an old save. converations in the game are based on defining variables and those variables didn't exist in the previous save files and updates so you have to start fresh. But the chapter select menu let's you skip to various places so you don't have to replay it. you missed like half of that scene. If you're interested in seeing the entire scene, go to main menu, new game, part 4, chapter 10 update. that'll drop you at the second half of the last update. hold ctrl down to fast forward past any text you've already scene. it'll stop when it's time to make a choice or if it's text you haven't seen before. you should be able to fast forward back to that point in the game in a few seconds and then see the rest of the scene. there's some pretty heavy stuff in that scene that changes a lot.