The Blood Phoenix 3: An X-Men: Apocalypse Fanfiction
10 parts Complete Adelaide Lehnsherr is now Adelaide Xavier. The world is not what it seemed, now that she's returned from Vietnam. Left with nightmares and post-traumatic stress, she suffers a tenuous relationship with her husband, Charles Xavier. With no one to turn to, she goes to her father Erik Lehnsherr, living in Poland with a wife and daughter. When things turn sour, though, she believes that joining Apocalypse against her fellow mutants is for the best.
But she just can't.
So will she join Apocalypse and be destroyed, or will she return to her husband Charles and rekindle her relationship with him and rejoin her fellow mutants in the fight of her life?