I think Diana's character has been thrown away with this episode. She has shown herself(s1) to be extremely tolerant. She keeps her opinions to herself and accepts other people's different views and opinions without judgement. It's illogical for her to be "shocked" about her aunt. It'd be more logical that'd she'd feel out of place in a "crazy" party because it's not her nature and she doesn't find any people who she could relate to. People who should be close to her, alienate her, they're too busy having fun. After all she did to make sure Anne felt good at school. She could have had fun on her own at school - she fit in there. But she tried so that everyone would feel good. Meanwhile Anne seems to be only understanding to outcasts of "normal society".
