After finding the prince, Iron-Claws says he will wait with the Alfiq while I go back to the prince's brother, but when I returned to the mission, Iron-Claws was already there. I think I exhausted the dialog options that were available to me with the Alfiq (I was playing a Khajiit so I was able to communicate), but I didn't give him moon sugar. Still, Iron-Claws insisted he would stay and watch over the prince so it was strange he was back in the mission before me...