Khloé Kardashian is dedicated to making her coparenting relationship work with her ex-boyfriend Tristan Thompson for the sake of their 2-year-old daughter, True.The Good American cofounder, 36, opened up about her partnership with the Cleveland Cavaliers player, 29, in a bonus clip from season 18 of Keeping Up With the Kardashians.Andy Cohen bumps into the reality star at an event and immediately questions Kardashian on her relationship with her ex.“You know what, Tristan and I are in a really