Sir Robert and Lady Smyth with Their Son, Hervey Andrea Soldi (1703-1771)

The picture has something of this: people, woman, child, family, three, group, two, son, portrait, four, girl, wear, offspring, princess, man, baby, love, sit, sibling.
Perhaps it’s a painting of a man and a woman with a boy in a blue dress and a man in a white.