True Thompson is your niece she is the daughter of your sister Khloé Kardashian and Tristan Thompson ex-your brother-in-law and she is the sister of Tatum Thompson and her aunts are you and Kim Kardashian and Kourtney Kardashian and Kendall Jenner and Kylie Jenner and her only uncle is Rob Kardashian and the grandson of Kris Jenner and her cousins are North West and Saint West and Chicago West and Psalm West and Mason Disick and Penelope Disick and Reign Disick and Rocky Barker and Dream Kardashian and Stormi Webster and Aire Webster