Her expression is, to put it lightly, viscerally stunned. That's not how it works, that's not how it ever works. Even when Jean shared her memories - well, she said it herself, giving them to Madelyne didn't mean taking them away from her. Illyana chose her to rule Limbo out of understanding, out of camaraderie, but she wanted to give it up.

Hunter gave Edwin his life back, and in exchange took nothing at all; in exchange he gave him an easier way to live it. And now Edwin wants to -

She's already shaking her head by time he finishes.

"I don't - look, contracts are something I can accept." Of course she doesn't realise, as she verbalises this, how many of her fundamental issues are bound up in it: that toxic, simmering blend of pride and despair. "I'll get them back myself. With a deal of my own, maybe, or some other way."