Answer:
Art's stepmother and his father's friends were all Holocaust survivors.
Step-by-step explanation:
"Maus" is a graphic novel and a historical, biographical account of Art Spiegelman's father. Art's father was a Holocaust survivor. In Maus, Art writes about the experience of his father during the Holocaust.
After Art's real mother committed su-i-c-i-de, his father remarried Mala, another Holocaust survivor. In chapter one of the book, "The Sheik," Art remarks that the commonality shared between his stepmother and his father's friends is that they all are Holocaust survivors.