[Anduin's eyebrows pinch together slightly as he tries to figure out how best to answer this question.]

Because... He is Wrathion.

[He flicks his eyes up to meet hers.]

The black dragonflight, Wrathion's family, it... Does not have the best history. Nor does Wrathion himself, for that matter. I have forgiven him of his past misdeeds. But -- not everyone has done.