Portrait of M. E. Solntseva, sister of the painter Zinaida Serebryakova (1884-1967)

The picture has something of this: people, wear, seat, portrait, woman, furniture, room, book bindings, sit, reclining, pants, man, bed, two.
Perhaps it’s a painting of a woman sitting at a table with a book in her hand and a pen in her other hand.