Kylie Jenner joins sisters Kourtney and Khloe as they pose in eye-wateringly tight waist trainers - Mirror Online

#xa; The trio were without Kim and Kendall as they got hard at work defining those already impressive abs

Kylie Jenner joins sisters Kourtney and Khloe as they pose in eye

Kylie Jenner joins sisters Kourtney and Khloe as they pose in eye

Kylie Jenner poses with sisters Kourtney and Khloe Kardashian

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Kylie Jenner joins sisters Kourtney and Khloe as they pose in eye