These are probably her last two children, Maynard (b. 1898) and Mercy (b. 1904).
From liveinternet.ru/users/otatuana/post280249146; sepia tone removed.
Daisy’s dress has a swollen bodice and a slim skirt beneath a vest-like bodice. She wears a sheer ornamented wrap.
Keywords: Frances Evelyn Maynard, Countess Daisy Greville, Lady Brooke, Countess of Warwick, Maynard family, Greville family, Countess, British, mistress, Edward VII, curly coiffure, bangs, feathered cap, earrings, long close sleeves, waist band, close skirt