Machado de Assis 
Confessions of a Young Widow [EPUB ebook] 

After the death of her husband, a widow decides to reveal the hidden truths of her marriage, including her secret relationship with Emílio, a lover who transformed her life. In a narrative full of irony and criticism of social conventions, Machado de Assis dismantles the facade of marital perfection and exposes the complexities of human passions.