Kourtney Kardashian took to Instagram to wish her nephew Saint a happy birthday on Sunday by sharing an adorable photo series featuring her son Reign.The 42-year-old Poosh founder posted snaps of the six-year-old boys twinning in joggers and custom nameplate necklaces while shirtless on a trampoline.Both boys showing off their infectious personalities, Kourtney remarked: 'Name a cooler duo.' Cousin love:The Poosh founder took to Instagram to wish nephew Saint a happy 6th birthday with a series of snaps featuring her son Reign where both boys matched in joggers and nameplate necklaces Fostering their bond:The images appeared to be taken on a trampoline in Kourtney's Hidden Hills backyard during one of their many cousin playdatesThe images.
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