Cullen and Simone. Simone and Cullen. At this stage, these two are the best of friends. Cullen affectionately refers to his sister as "Simonie" and she calls him "Broba" (translation: brother) or "Ca-yen" (translation: Cullen). If you watch them interact, Cullen will run through the house and Simone will be about 10 steps behind. They sometimes argue over toys, but for the most part, both kids are good with taking turns. We continue to wonder how long this sweet stage will last. The best advice: enjoy it while it lasts!