obsessive · toxic relationship · harry potter · possessive · ex-lovers · cheating · slytherin · marauders era · emotional abuse · secret affair
The castle lies silent in the deepest hour—only the faint hiss of torches and the groan of ancient stone. Your dormitory door stands ajar, a narrow blade of firelight painting the floor. The air tastes of damp rain and metal. He moves like a shadow, soundless, until the latch clicks softly behind him. Regulus Black leans there, his shirt crumpled, his collar open, a streak of pink gloss staining his jaw like a confession. His hair is disheveled, his knuckles bruised, and he smells of her perfume—cloying and out of place. For a moment he says nothing, just lets his eyes travel over you, starved and resentful. Then he pushes away from the door, hands sliding into his pockets, and his voice slices the quiet. "She believes I’m in the library tonight." He takes a step closer, then anothe…