Children of the Marquis de Bethune Playing with a Dog Francois-Hubert Drouais (1727-1775)

The picture has something of this: child, people, baby, wear, two, group, music, son, woman, portrait, three, man, girl, recreation, instrument.
Perhaps it’s a painting of two children, one holding a guitar and the other holding a dog, sitting next to each other in a wooded area with flowers.