Originally Posted by Buffalobiian
Normally, a person who's unloyal to you doesn't need to act that way unless he has a better person to turn to. Oro is a pretty powerful person to serve, so there wasn't a NEED for Kabuto to do anything suspicious or unloyal. When Oro lost his arms, however, he kept by him. Now that either indicates that he is truely loyal to Orochimaru, or that he just think he's still the best person to serve for the time being. Being by his side at a time like that also deepens whatever trust Oro may have had in him, which is a perfect tactic for a spy. And besides, we only know Sasori wanted to spy on Oro, he hadn't neccessarily told his spy to do anything hostile or destructive, just pass on info.