Disclaimer: Nothing is mine but the idea.
"Trust my rage," I told Thor. I wonder if he truly understands why. Perhaps so; I'm beginning to think I've always underestimated him.
Consider. Malekith can sense the Aether in Jane; that's why we're here. But he couldn't sense its absence from Mother's illusion – and, when he discovered the trick, he couldn't find the real Jane unaided.
Where did Mother learn to both cloak and imitate the mark of something that's been hidden since the world's first dawn? That's one of a million things that now I'll never learn from her.
And Malekith thought I could conceivably be his ally…