2 Works in Mutant Revolution
It's been five years since the beach, and four years since Charles was captured by the Brotherhood. Since then, he's been kept in a safe house while Erik finally achieved what Shaw failed to do.
Now that most of humanity has been eradicated, Erik's summoned Charles back to his side, promising a cure and political influence in exchange for Charles' help - but Charles knows it's only a matter of time before he asks for more.
Prompt: Magneto is the ruler of the posthuman world.
His only secret? Charles Xavier, the human he's kept locked in his bedroom ever since his right-hand woman, Mystique, came to him pleading for mercy for her stepbrother, who accepted her mutant form and protected her as a child. The human he started fucking after Mystique was killed in battle, despite the guilt he feels at contaminating even this last promise to the woman who was integral to his life's work and happiness.