Jan and Cora Gordon with Marie Laurencin in pre-WW1 Paris
This was Marie Laurencin (1883-1956), whose mother was from Normandy. Her self portraits do suggest an air of prim modesty. One biography also observes that "it is difficult to envision the primly dressed, bourgeois-mannered young woman as an intimate of the aggressive, boisterous male artists and writers who comprised the inner sanctum of Pablo Picasso's studio, the Bateau-Lavoir, on the rue Ravignan in Montmartre." She was the only female artist associated with, and accepted by, the male-dominated, exclusive avant-garde art movements in early 20th-century Paris.
Her friend, the poet André Salmon (who was another acquaintance of Jan and Cora Gordon in pre-war Paris), wrote, "there is something of a fairy wand in the brush of Marie Laurencin." She was also known as Apollinaire's mistress and muse. Henri Rousseau painted the two of them together (1909) with the title "La muse inspirant le poète".
Jan Gordon later wrote about Laurencin in his "Modern French Painters" (I'm reading from the copy once in the library of Steven Spurrier, which contains a wonderful inscription from Jan Gordon):
"Marie Laurencin's compositions have in them that sense of gracefully co-ordinated action which seems physically to differentiate the sexes. They have in them a gesture. They have a perfection of innate and interwoven movements which dance as lightly as ever danced a maiden before the alters of Aphrodite." "..these paintings of Marie Laurencin make one think of those impromptu tales which mothers invent for their children upon a winter's evening. Though they may appear inconsequent in the elements of the picture, they have a plot as straightforward as that of a fairy tale."