Originally Posted by Loki882
I always got the sense that Magneto/Mystique were romantically involved even in the OT, they certainly implied it. Maybe Mystique is Pietro's mother (Erik hasn't shown any real attachment to women other than her). We don't have to have a Beast/Mystique romance, just acknowledge their bond and that they still care about each other, maybe simply as friends.
pietro would be about 10 years old in that case, and thats at the very least, its set 10 years after First class when she went with magneto, and pietro is only in the 70s stuff