Growing Apart

Your wife finds you experimenting with shrinking pills and the story follows the changing relationship as you gradually shrink smaller and smaller. At first your shrinking is mildly annoying as she finds herself having too look after you, but your new size is a novelty in and out of the bedroom. As you get smaller, the novelty begins to wear off and your usefulness comes to and end. Your wife stops seeing you as her husband, treating you more like her pet, her little plaything.