Secret (X-Men:First Class)

(Written with @BlakeSawyer_ -to be updated on a biweekly basis) Ashley and Addy have a dangerous secret. They're the nieces of the notorious Sebastian Shaw, a mutant bent out on destroying the human race and starting a nuclear war to do so.
Ashley and Addy happen to be mutants as well, and they are still learning how to control their abilities to be better. Ashley is able to stop mutants from using their powers, and Addy can control what someone thinks they can see.
They ran away from their uncle when they were younger, and have been using his resources ever since. They never stay in one place for long though.
One day, they are saved from a group of guys by none other than Charles Xavier and Erik Lensherr. The two guys try showing the sisters that they have no reason to be afraid. And they help them control their powers.
But what happens when Ashley and Addy fall in love, and their uncle catches up with them, and tries getting them back? Will the sisters finally have a happy ending, or will they be forever alone, trapped by this dangerous secret. Secrets: some should just stay hidden. Too bad they rarely do.