Although I believe this movie was aesthetically beautiful and had excellent cinematography, I had a serious problem with the story. But first a little background. I grew up in the capital of Guatemala city in a middle class neighborhood very much like the one portrayed in the film. The shape of the houses, the sounds, and the sights of this movie sparked long-forgotten memories of my childhood.
My Hispanic family was more fair-skinned and had fewer "indigenous" features than the domestics, who always were indigenous women from the countryside and rural areas with very little education and who were desperate for work in order to help support families back in their villages. And like the family portrayed in the movie, our domestics cooked for us, washed our clothes, and were generally in charge of most of the household chores.
And what I remember from my own experience (and that of other families who also had domestics) is that they were definitely NOT treated as a member of the family. On the contrary, they were to "keep their place", they were forced to eat their meals in a room separate from the rest of the family, forced to sleep in the "servants" room which also functioned as the storage room which was often small and dilapitated (it was the servants room, why bother painting it). I remember once when we had two servants, one did not have a bed so she had to sleep on the hard ground on a straw-mat "tapete". And I can go on. So if the director had a different experience than I did (and what is generally known to occur in these types of arrangements in Latin America) I am certain it was an exception but definitely not the rule where Native American female domestics have historically suffered sexual abuse, economic exploitation, and other injustices by the Mestizo patrones.