Tuesday Plays the Piper (слэш)

In a world where the population is barely holding steady, those of either gender who are capable of bearing children are considered a prized commodity. In all places beyond Westchester, their rights are few--and, with Erik Lehnsherr poised to tear down the gates of the city, even that last haven is on the brink of destruction. But, for Charles Xavier, the consequences of conquest may prove to be more personal than political. No one quite knows why Erik is so set on capturing his old friend and partner in the war against Shaw: Charles is no bearer, and he's disinclined to aid Erik in firmly establishing mutant supremacy once and for all.
Charles, however, is all too aware of Erik's reasons. Erik knows things about him that no one else does--things which, if brought to light, would would mean surrendering far more than just a kingdom.