User blog comment:Knightofthecart/Morgana has turned her back/@comment-4135736-20120315125653

I'd say that Morgana officially turned her back on her friends after Merlin poisoned her because Merlin was the only person in Camelot who knew that she had magic and was there for her while Arthur and Gwen did not know what Morgana really was and the troubles she went through while dealing with both her magic and Uther's actions. Morgana had officially turned against Uther when he ordered Alvarr to be excecuted but she was still hesitant to harm her friends but once Merlin poisoned her, Morgana then felt that she had nobody in the Kingdom who cared about her and therefore turned against Merlin and everyone else. Although Arthur and Gwen were not her main targets, Morgana eventually became their enemy once she learnt that Arthur was her half-brother and that he had feelings for Gwen. Gaius was the last person who she turned against, especially once she believed that he knew about Emrys. As for Gaius saying that Morgana chose to use her magic for evil, I disagree with that because Morgana was still evidently conflicted over her loyalties to both Camelot and Morgause, and she did not know much magic at that time to use it for evil. I also do not believe that Morgana knew that she was the source of the sleeping enchantment because once Morgause enchanted her, Morgana thought that her meeting with Morgause was a dream, Merlin just misunderstood that happened and believed the worse in her, leading to him poisoning her.