Cause

Erik is furious when he returns to the mansion on his and Charles' two year anniversary to find Charles in bed with someone else. Charles, under the influence of another mutant, is utterly horrified when he realizes what he's done. Will Charles be able to explain himself before their anniversary ends in genocide?

*I do not own the X-Men or any of the characters in this story. This is purely fanfiction and is not affiliated with the X-Men franchise.*