Wheatley's portrait style has much in common with the traditional conversation pieces of artists such as Arthur Devis. While the figures in Wheatley's portraits are larger in proportion to the background than in Devis' works, both artists employed the same formula of presenting middle-class families engaged together in some pleasant activity, often with one member of the group looking out at the viewer.
The figures of this group are arranged in a parklike setting, silhouetted against a backdrop of dark-green foliage. Wheatley suggested the psychological relationships of the subjects through their physical arrangement in the group. Despite the difference in size, the mother and daughter are, in effect, mirror images of each other, brought together by similarity of their forms and postures. The daughter's intimate relationship with each parent balances and unifies the composition.
Wheatley portrayed sitters' faces with great sensitivity, but his artistic talents are best seen in drapery and costume details. Moving easily from broad, suggestive brushstrokes to ones that are fine and precise, he achieved a variety of techniques that stimulate and delight the eye.
More information on this painting can be found in the Gallery publication British Paintings of the Sixteenth through Nineteenth Centuries, which is available as a free PDF https://www.nga.gov/content/dam/ngaweb/research/publications/pdfs/british-paintings-16th-19th-centuries.pdf