Who is the son of the man to whom Marie-Thérèse Walter was a mistress?
Paulo
Title: Marie-Thérèse Walter
Passage: Marie-Thérèse Walter (13 July 1909 – 20 October 1977) was the French mistress and model of Pablo Picasso from 1927 to about 1935, and the mother of his daughter Maya Widmaier-Picasso.  Their relationship began when she was seventeen years old; he was 45 and still living with his first wife, Olga Khokhlova.  It ended when Picasso moved on to his next mistress, artist Dora Maar.
Title: Nude in a Black Armchair
Passage: Nude in a Black Armchair (Nu au Fauteuil Noir) is a painting by Pablo Picasso.  Painted on March 9, 1932, a time at which Picasso lived in Boisgeloup outside Paris, it is the first and largest of a series of paintings Picasso completed that year of his mistress Marie-Thérèse Walter.
Title: Olga Khokhlova
Passage: Olga Picasso, born Olga Stepanovna Khokhlova (Russian: О́льга Степа́новна Хохло́ва , June 17, 1891 – February 11, 1955) was a Russian ballet dancer, but better known as the first wife of Pablo Picasso and the mother of his son, Paulo.
Olga Khokhlova Marie-Thérèse Walter