Catherine Zeta-Jones and Michael Douglas showcased how they were able to keep their love alive with a new Instagram post.MORE: Catherine Zeta-Jones shows support to Michael Douglas on emotional dayThe two packed on the romance and the PDA for the gram with a series of photos that showed off their more affectionate side.WATCH: Catherine Zeta Jones makes hilarious comment about Michael Douglas and family genesCatherine posted a series of selfies of just the two of them with the water in the