Celestia was glad to see he was under control, but she couldn’t help but be slightly aggravated. Here she had been doing everything in her power to maintain as professionally political a relationship as possible with the human, which in turn achieved nothing. Then all Luna had to do was dangle a bottle of alcohol in front of him and she had him wrapped around her hoof. He was even willingly allowing Luna to touch him. If anypony else had tried that he would have most likely taken a swing at them. Some small part of her merely blamed the fact that Luna tended to grease the wheels of compliance with treats.