Princess Eugenie has shared a gorgeous photo of herself with husband Jack Brooksbank to mark Valentine's Day.The 31 year old, who recently paid tribute to her "hero" son on his first birthday, took to her Instagram feed to post the sweet snap, which saw the pair standing underneath cherry blossom trees. Her Majesty Queen Elizabeth II's granddaughter could be seen wearing a black T-shirt with some matching jogging bottoms alongside a blue jumper tied around her waist. She also donned a pair of white Converses and black sunglasses for the pink-themed walk.