Shades of American Gothic. Kind'a offbeat, kinda' a lil' bit weird, kinda' artsy...the tree reminds me of the Thornberry trees used to create cattle-resistant hedgerows back in the 1930's here in the western USA...scraggly trees, but with sharp thorns that kept cattle, and sheep, and trespassers away! The stock pond or the irrigation pond behind her, the landscape, the time of year...all very un-conventional, slightly edgy. Likely relevant to the mother to be and where she lives and what time of the year the baby is at the stage it is.