They would continue their journey in the desert avoiding as much trouble as possible since they were still animals and could get easily distracted by other creatures roaming. Eventually, the brother and sister duo would split up with the one heading to Cloud and the other to Leaf. Hopefully, they could divide and conquer without getting themselves into too much trouble and causing an international conflict in the process. After all, Kyuji merely wanted them to deliver a letter and then get back home safely without any trouble since they were risking their lives doing "dirty" work. Only time would tell if they were successful or not!
[NPCs leaving country and this will be accomplished in an hour. One heading to Leaf and one to Cloud. Topic enter/left in an hour]