You still haven't proven you're really cured. You could still be lying..

It isn't futile! Mother still cares. Even if I'm not the favorite, she'll still get everything she wants, right? That's all that matters. As long as you're out of the picture, your entire race, Mother will be happy. Even if it is Sephiroth, what Mother set out to do all those years ago will finally come to pass. It doesn't... matter to me. And it doesn't matter to you.

Where did you get those ideas, though? I didn't tell you any of them...