The Duchess of Cambridge's brother James Middleton caused a stir on Friday when he posted a sensational photo of his fiancée Alizee Thevenet in a bikini as they walked their beloved pet dogs. MORE: James Middleton's fiancée Alizee Thevenet just rocked this celebrity-loved cult bikini - and she looks incredibleFacing away from the camera, Alizee could be seen wearing nothing but a string bikini by Pink House Mustique and a pair of Hunter boots as she strolled through the British