Eventually. The Avengers and a group of mutants were able to remember what the world was supposed to be like, and got her to fix things. She got upset, though... she blamed her father, a mutant terrorist who always thought that mutants were better than humans. He thought they should either die or serve us, so she made it so they did, in the alternate world. But that wasn't enough, I guess. There was still so much fighting. People died.

[He fidgets, twisting his fingers together a bit.]

She said, "No more mutants." And nearly all the mutants in the world lost their powers, just like that.