Ayda Field and her family have been enjoying a sunny Saturday at home, and to mark the occasion she shared an incredibly rare picture of her eldest son, Charlie, six.MORE: Robbie Williams and Ayda Field's jaw-dropping homes in LA, London and Malibu revealedAyda and husband Robbie Williams, who tied the knot in 2010, are proud parents to three other children, Theodora, eight, Coco, two, and Beau, one.WATCH: Robbie Williams and Ayda Field are the perfect doting parents during fun games nightIn the