Portrait of Madame Georges Hugo (nee Pauleen Menard Dozian) and Her Son Jean Giovanni Boldini (1842-1931)

The picture has something of this: woman, fashion, dress, wear, people, girl, portrait, dancing, beautiful, style, model, glamour, performance, music, veil, fashionable, dancer.
Perhaps it’s a painting of a woman in a green dress and a young girl in a white dress, both of them leaning on each other’s shoulders.