Click image for larger. Image credit Wikimedia Commons, here. Self-Portrait with His Wife, Guiseppe Baldricghi, 1756, oil on canvas, 49" x 63", held by Galleria Nazionale, Parma, Italy.
In this forceful double portrait Baldrighi depicts himself in his work clothes, in the process of posing his wife. The young woman is sitting a little stiffly, with a forced smile. On her left, with a vitality that contrasts with here bearing, the cat has focused on the little birds' cage, and has assumed the typical pose cats adopt before pouncing.
"Vitality"--why, cats own that word! While the humans work, the cat, well, continues to do cat things.