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Kourtney Kardashian shows off her pert derriere in a racy thong bikini on a night swim
Kourtney Kardashian flaunted her sensational bikini bodyin a racy thong bikini to hermore than 102 million Instagram followers on Wednesday night.While flashing her incredibly taut midriff andpert derrière, the 41-year-old reality star looked completely serene during her evening dip under the stars.As she floated in the water with her hands fully extended above her head, the self-professed 'night swimmer' gave fans a close-up of her famously gym-honed figure.