When Frida was eleven months old her mother gave birth to Cristina, the youngest daughter of Guillermo Kahlo and Matilde Calderón. The infant Frida was entrusted to an indigenous wet nurse who took care of her.
Years later Frida recreated these circumstances in her painting My Nurse and I, on which she portrays herself with the body of an infant and the face of an adult. She is held by her wet nurse, an indigenous women whose face is concealed by a pre-Columbian mask, making it impossible to determine whether she enjoys or dislikes caring for little Frida. Visible within the left breast of the wet nurse are the ducts of the mammary gland which carry milk to the mouth of the baby Frida, while two drops of milk issue from her right breast, about to drip onto the dress of the infant, as if it were made out of the same substance. The milky rain in the background recalls the explanation of the rain given to Frida by her wet nurse: “The raindrops are the milk of the Virgin Mary.” This milk gives life to the lush vegetation in the background, which includes a news species of plant with a large milky-white leaf.