I would, but first I need to know if Zekolyn can see through Abduxuel's disguise.  If the method he's using to disguise himself is one of those 'add +10 to your Disguise check' illusions or transmutations, then we can just assume that they both took 10, and Abduxuel's Disguise beats out Zekolyn's Spot.  If not, the dragon gets a 31 Spot by taking 10, though I can also roll if need be.