Pairing: Kitty (Shadowcat)/Sarah (Marrow)
Kitty was raised to believe in "happily ever after", told the same stories as any other child growing up in a happy home. In spite of everything, she still believes happily ever after can come true.
It irritates Sarah, most of the time; Sarah, moved from foster home to foster home, implicitly taught to believe herself monstrous - and then, when she found herself a freak among freaks, saw them all slaughtered. They fight about it, sometimes.
Kitty tries to convince her lover that she is not a monster. And even if she were, monsters can get fairy-tale endings, too.