Kris Jenner is paying tribute to daughter Khloé Kardashian's ex Tristan Thompson's brother Amari. "Happy birthday to our sweet angel boy, Amari!!!" Jenner, 69, wrote via Instagram on Sunday, July 27. "You have touched all of our lives in ways I can't explain. Through every smile, every hug, and all of the special moments we share together, you remind us of what truly matters... love, family, being present, and showing up for one another with our whole hearts." Alongside the message, Jenner shared a series of photos of Amari, 19, through the years.