Complex sentence: She makes no appearance in "The Godfather Part II", and in "The Godfather Part III", she is present in a manner inconsistent with her fate as described in "The Godfather" novel.
Split into simpler sentences: She makes no appearance in "The Godfather Part II". In "The Godfather Part III", she is present in a manner inconsistent with her fate as described in "The Godfather" novel.