Since I don't have detailed knowledge of the 'after ever after novel', it could potentially be a fantasy novel where the heroes have saved the world from an evil force and now the story is about how the world is like in the aftermath. It might explore how the different species interact now that the threat is gone, how the political structure has changed, and how the individual characters grow and adapt to this new world. There could be new challenges that arise from the very solution that saved them in the first place, and the novel could be all about that exploration.
Since I haven't read the 'after ever after novel', the main characters could be a family. After a major upheaval in their lives, like the loss of a family member or a financial disaster, they each struggle in their own way. One might be a rebellious teen trying to break free from the new constraints, while another could be a parent trying to hold the family together. And there could be other characters around them who either help or hinder their journey in this 'after' phase.
Yes, there might be. If it's a fictional work, there would be a plot that continues after the 'ever happy' part. It could be about the characters growing, evolving, or facing new situations.
I'm not entirely sure which specific 'ever happy' you are referring to. It could be a book, a movie, or something else. Without more context, it's difficult to tell the full story that comes after.