structural:reformatting, stylistic:tone
Marriage and family

Of his youth, Rubinstein once said: "It is said of me that when I was young I divided my time impartially among wine, women and song. I deny this categorically. Ninety percent of my interests were women." At the age of 45, in 1932, Rubinstein married Nela Młynarska, a 24-year-old Polish ballerina (who had studied with Mary Wigman). Nela was the daughter of the Polish conductor Emil Młynarski and his wife Anna Talko-Hryncewicz, who was from a Polish aristocratic heraldic family of Iłgowski coat of arms. Nela had first fallen in love with Rubinstein when she was 18, but married Mieczysław Munz, another Polish-American pianist, after Rubinstein began an affair with an Italian princess. Nela subsequently divorced Munz and three years later married Rubinstein. They had five children (one died in infancy), including photographer Eva Rubinstein, who married William Sloane Coffin, and son John Rubinstein, a Tony Award -winning actor and father of actor Michael Weston. Nela subsequently wrote Nela's Cookbook, which included the dishes she prepared for the couple's legendary parties.

Both before and during his marriage, Rubinstein carried on a series of affairs with women, including Lesley Jowitt, the wife of the British politician William Jowitt, and Irene Curzon.

In addition to fathering a daughter (Brazilian pianist Luli Oswald) with the Italian marchioness Paola Medici del Vascello (née Princess Paola di Viggiano, also: Donna Paola Sanfelice dei Principi di Viggiano), he may have been the father of American decorator and artist Muriel Draper 's son Sanders Draper, who died in World War II. Luli Oswald was never recognised by her biological parents, hidden from the public and given as a newborn to a friend of Rubinstein's, the Brazilian conductor and composer Henrique Oswald (1852-1931). The latter's daughter Maria and her husband Odoardo Marchesini raised her and adopted her. The adoptive parents signed an affidavit in 1967 stating that Luli Oswald had been entrusted to them by her biological parents Paola Medici and Arthur Rubinstein because she was the "fruit of a forbidden love." After the adoption, her name was Margarida Henriqueta Marchesini. Oswald later performed under the stage name Luli Oswald.

Though he and Nela never divorced, in 1977, at age 90, he left her for Annabelle Whitestone, then 33 years old.