Lyalya (Adelaide Yakovlevna) Simonovic. 1880 Valentin Serov (1865-1911)

The picture has something of this: portrait, people, wear, vintage, child, retro, man, antique, son, woman, veil, costume, dress.
Perhaps it’s a close up of a painting of a young boy wearing a white shirt and a white collared shirt with a white ruffle around his neck.