But that's the point. All of us are unreliable narrators, and relay our histories through our own eyes, emotions, and the settings and people around us. A huge theme in the story, too, is doubt. She is doubting herself, her ability to parent, her son, her husband, and her memory.
Eva even says in one missive to Franklin that it's "her story" and she will tell it her way. It IS a case of a narrator providing a subjective account. And yeah, doubt runs rampant throughout. Everybody's perspective is valid and we can all learn from different points of view. While I personally hate vampires and don't care for the predictable romance genre, that's okay. For others who enjoy those genres, great as everybody is entitled to their taste. As for this book, I liked it even if I might not have been overly fond of some of the characters. Everybody's opinion counts and not just the ones we support. I like learning from others.