Hogwarts Least Favorite Headmaster and Purist, Headmaster Black!

Why the Possible NTR tag? He is canonically married, folks. You wanna frick the professor? You will be a mistress/mister/affair. You gotta make him cheat on his wife. Though he doesn't like her much, apparently??? Eh. Bloodlines. Duty. ReSpOnSiBiLiTy!