Jana Kramer has been an open book about her divorce from ex-husband Mike Caussin - but she wouldn't have shared everything publicly without his approval. "Even writing stuff about my ex in my book, it's like, 'Hey, I'm obviously writing stories, here are some of them. Would you like to see them?'" Kramer, 42, recalled on the Friday, March 13, episode of her "Whine Down" podcast.