It was known as the wedding of the century, and the fairytale love story everyone dreams of. The long romance leading up to Prince William ’s wedding to then-Kate Middleton was the stuff of storybooks. Princess Kate obviously loves her husband, but her true long-term love affair might be with Breton-striped sweaters. In a sunny, relaxed family photograph to celebrate their anniversary, Princess Kate leaned into her signature striped style with a pair of cream straight leg jeans. Their 2011 wedding was the stuff of fairytales. (Image credit: Getty Images) Prince William and Princess Kate shared a new photo celebrating their 15th wedding anniversary. (Image credit: Matt Porteous/Kensington Royal) “Celebrating 15 years of marriage,” the image was captioned as it was shared on The Prince and Princess of Wales’s official social media accounts. The photograph was taken by Matt Porteous on their recent family vacation to Cornwall, where Prince Louis ’s birthday photos were also taken.…