As to how she prepared for the film by Alfonso Cuarón, Yalitza shared that she worked very hard to make her performance as accurate as possible – something she achieved thanks to her mother and the long conversations she had with 'Libo.' Liboria Rodriguez, Cuarón’s the nanny was the foundation of the story.
"My mother has been a domestic worker for many years, so I had the opportunity to learn a little about her work and in this film I tried to combine how she was, things I remembered about how she did her job, and also other things that 'Libo' had said. I was mixing those things to personify the character. "