Article continues below advertisementKendall Jenner is making waves - literally.The 29-year-old model gave fans a sultry glimpse into her lake day, sharing a snap on Instagram Stories of herself crouched on the back of a boat.Article continues below advertisementRocking a black string bikini, an O'Neill life vest and a navy baseball cap, the supermodel showed off her toned figure while getting her wakeboard ready. The cheeky shot caught her from behind as she geared up to hit the water and soak up the sun.