Aww, Roommates! Tristan Thompson went all out for a joint birthday bash for his brother Amari and his son Tatum, whom he shares with Khloé Kardashian. He hopped on social media recently to drop pics from their big birthday bash, and it was a whole family affair. Let's get into it!RELATED: Khloé Kardashian Spills Tea On What Her Daughter True Really Thinks About Her Situation With Tristan Thompson (WATCH)Tristan Thompson Celebrates Son & Brother's Birthday With Khloé KardashianTristan Thompson dropped some behind-the-scenes flicks from the birthday turn-up for his younger brother Amari and h...