Parece que pode ser o conto "O Gato Preto" de Edgar Allan Poe de 1843 Se é este, você parece ter misturado várias histórias ou ter se esquecido disso.
Esta história é contada a partir da narrativa em primeira pessoa e conta a história de um homem que se torna um alcoólatra, maims, em seguida, mata seu gato. Sua casa está queimada e ele encontra um novo gato que parece muito semelhante ao antigo, exceto por uma mancha branca no peito. Ele chega a desprezar esse novo gato, que ele leva para casa e eventualmente tenta matá-lo, e ao fazê-lo acaba matando sua esposa. A história termina com o gato sentado no cadáver de sua esposa.
Diz-lhe para matar seu gato, o que ela faz
One morning, in cold blood, I slipped a noose about its neck and hung it to the limb of a tree;—hung it with the tears streaming from my eyes, and with the bitterest remorse at my heart;—hung it because I knew that it had loved me, and because I felt it had given me no reason of offence;—hung it because I knew that in so doing I was committing a sin—a deadly sin that would so jeopardize my immortal soul as to place it—if such a thing were possible—even beyond the reach of the infinite mercy of the Most Merciful and Most Terrible God.
"The Black Cat" - Edgar Allan Poe
No final há uma sala com um gato morto e uma mulher morta que se enforcou.
Enquanto não há voz, por si só, na história, o narrador escreve sobre seus próprios pensamentos e muitas vezes pensa em matar os dois gatos, mais ainda o segundo, em grande parte da história, por exemplo: p>Of my own thoughts it is folly to speak. Swooning, I staggered to the opposite wall. For one instant the party upon the stairs remained motionless, through extremity of terror and awe. In the next a dozen stout arms were toiling at the wall. It fell bodily. The corpse, already greatly decayed and clotted with gore, stood erect before the eyes of the spectators. Upon its head, with red extended mouth and solitary eye of fire, sat the hideous beast whose craft had seduced me into murder, and whose informing voice had consigned me to the hangman. I had walled the monster up within the tomb.
"The Black Cat" - Edgar Allan Poe
And now was I indeed wretched beyond the wretchedness of mere Humanity. And a brute beast—whose fellow I had contemptuously destroyed—a brute beast to work out for me—for me, a man fashioned in the image of the High God—so much of insufferable woe! Alas! neither by day nor by night knew I the blessing of rest any more! During the former the creature left me no moment alone, and in the latter I started hourly from dreams of unutterable fear to find the hot breath of the thing upon my face, and its vast weight—an incarnate nightmare that I had no power to shake off—incumbent eternally upon my heart!
"The Black Cat" - Edgar Allan Poe