John Verney, 14th Baron Willoughby de Broke (1738-1816) and Lady Louisa North (1737-1816) his wife Johann Zoffany (1733-1810)

The picture has something of this: people, veil, furniture, seat, wear, woman, group, opera, dress, room, child, royalty, theater, man, two.
Perhaps it’s a painting of a man sitting at a table with two children in front of him and a woman sitting.