Question: Who is the son of the man to whom Marie-Thérèse Walter was a mistress?
Sentence (from "Geneviève de Fontenay"): Geneviève Suzanne Marie-Thérèse Mulmann (born August 30, 1932), also known as Geneviève de Fontenay, is a former chairman of the boards of Miss France and Miss Europe.
Relevant evidence: No