Rivas Mercado was born as the second of four children (Alicia, Antonieta, Mario, and Amelia) of the notable architect
Antonio Rivas Mercado and his wife Cristina Matilde Castellanos Haff. Around 1910, during the
Mexican Revolution, her parents separated, and her mother moved together with Antonieta's older sister Alice to Paris, where they stayed until their return to Mexico in 1915. Antonio Rivas Mercado refused to let his wife move back into the family's house, as a result of which Antonieta had to assume more responsibility at home. With her father's permission, at the age of 18, she married British-born, American-raised engineer Albert Edward Blair, and gave birth to their son Donald Antonio (Tonito) on September 9, 1919. During the time the young family lived in a ranch in the
state of Durango, there were periods when Antonieta Rivas sought separation from Blair, but he did not consent, as a result of which she was sometimes depressed. Rivas Mercado eventually moved to Mexico City and unsuccessfully tried to file for divorce, and to obtain support for her son. In 1929, she had an affair with the politician
José Vasconcelos, and later supported his electoral campaign. However, this love affair also proved to be fruitless, since Vasconcelos was married. In 1931, Antonieta followed Vasconcelos to Paris and, when rejected, shot herself at the altar of
Notre Dame de Paris. ==Cultural depictions==