Family Group shows three children of the painter, Mabel Nicholson, and her husband William, with their nursemaid. The oldest child, Ben, who later became a painter, is not included. Tony stands looking directly at the viewer, his left hand resting on the nurse’s chair. At the nurse’s feet is Nancy, her knees pointing up towards her younger brother, Kit, who stands on the table playing with a model ship. The ship completes the circular dynamic.
The composition emphasises the differentiation of the sexes. The females are seated together, with their heads slightly bowed. The boys, by contrast, stand.