Christie Brinkley has shared a series of sweet snaps with her son Jack all while rocking a slinky blue swimsuit.The mom-of-three showed off her figure in the strapless suit, which was a deep royal blue and featured a clasp detail on the chest.Christie paired the outfit with a leopard-print sarong as she and son Jack posed for pictures on an overcast day.MORE: Christie Brinkley wows fans with seriously breathtaking beach photosWATCH: Christie Brinkley shares the secrets to her age-defying skinThe