Morning. You're listening to Cosmo's Daily News Update. As many heartbroken ‘Step Up’ fans already know, Channing Tatum and Jenna Dewan are no longer together. While they’re both happy and in new relationships now, their fans can’t stop thinking about what prompted them to divorce after nearly 10 years of what seemed, from the outside, to be a happy marriage. Well, in Jenna’s new book, she opens up about how their dynamic shifted over the years...for the worse.