Despite the ups and downs of the Kardashian-Thompson dynamic, Khloé Kardashian has revealed that she's taken on the role of caretaker for Tristan Thompson's younger brother, Amari, amid his epilepsy. Now she's opening up about her commitment to his health despite her rocky relationship with his big brother. Source: Jerritt Clark / Getty Over the last 10 years, the public has been well-acquainted with Khloe Kardashian's very complicated relationship with Tristan Thompson, the father of her two children, True and Tatum.