Gonzalo Martínez died of a heart attack in 1916, while traveling on a train with his daughter. With his death, Martínez moved from their home to live with her brother and his wife in an apartment on Calle de Santa Teresa (now Calle Guatemala). Keen to ensure she would become a responsible wife and homemaker, Miguel's wife sent Martínez to complete a traditional education at the Colegio del Sagrado Corazón. Unhappy with her options, Martínez wanted more, saying, "I don't know why since childhood, I had the idea that I wanted to do something not everybody did. What I've hated most about my life is that they order me around and they limit my freedom". She went on to further her education at the Escuela Nacional Preparatoria, meeting Frida Kahlo there in 1922. The two women formed a close, lifelong friendship. In parallel, her relationship with her childhood friend Manuel Álvarez, burgeoned into romance. The couple often roamed the streets together observing the beauty beneath the city's grime and poverty.