This painting was inspired by the painting, Gabrielle DEstrees and Her Sister 38.4 x 50, Musee du Louvre painted by the master of the School of Fontainebleau about 1595. There are images of this painting on the internet, or I can email you one. Gabrielle DEstrees 15711573-1599 was the mistress of French King Henri IV she died at about age 28. The meaning or explanation of the painting of Gabrielle and the other woman is pure speculation no one knows.
The DEstrees painting was in turn influenced by the Francois Clouet 1510-1572 painting of Diane de Poitiers 1571, now in the National Gallery, Washington, D. C.