Prince William and Princess Catherine may have one of the most iconic romances in the world, but it almost NEVER wound up the way it is today! In Russell Myers' upcoming book, William and Catherine, The Monarchy's New Era: The Inside Story, he details the ultimatum that almost broke the couple up forever - and how Queen Elizabeth II and a party fixed everything! Related: Princess Catherine KNEW Prince Harry Wanted Out! In the excerpt, obtained by People on Wednesday, Myers reveals that the pressure of the high-profile romance started to weigh on Kate Middleton after several years together (the...