They laughed, drank expensive cocktails, posted stories, and discussed where they would travel the following weekend.

When the housemaid Marta, a woman who had worked in their home for almost ten years, came out with a tray of drinks, the group began whispering and giggling. To them, she was like a piece of furniture — a familiar part of the house no one really noticed.

— Come swim with us! — one of the girls shouted.

Marta blushed and shook her head:

— No, thank you… I can’t swim.