 the thin line that separates brown stomach from pale groin. Blankly, they gaze at their bare pubic mounds before lying back on the daybed. The reason I bring them up is that in the context of the lazy river, they're unusually active. They spend more time on dry land than anyone else, principally taking pictures of each other on their phones. For the sisters, this business of photographs is a form of labor that fills each day to its limit, just as the lazy river fills ours.