Tristan Thompson Guilty? Khloe Kardashian's Beau Makes Shocking Move Following New Cheating Allegation Tristan Thompson reacted quickly after Instagram model Sydney Chase disclosed their alleged romance while the athlete is in a relationship with Khloe Kardashian. This week, Chase claimed that she became Thompson's fling in January since he claimed that he was single. After revealing the information in an interview, the basketball player reportedly got in touch with her for breaking his privacy. On Monday, the Instagram model recorded a new TikTok video and shared updates about the claims she outed on the "No Jumper" podcast. According to Chase, Thompson contacted her immediately after the interview.