Hopefully it's movie Mystique played by Jennifer Lawrence from the reboot timeline and not cartoon Mystique since the latter was a horrible mother to both her sons (Nightcrawler and Victor Creed) and adopted daughter Rogue.

fsnfanboy said in comment #2623593:

Hopefully it's movie Mystique played by Jennifer Lawrence from the reboot timeline and not cartoon Mystique since the latter was a horrible mother to both her sons (Nightcrawler and Victor Creed) and adopted daughter Rogue.

But that version sounds a lot more interesting, though.