Who owns this bottom? #SatSpanks

Today's excerpt comes from The Outlaw's Bride, one of five westerns set in 1870 as part of The Sons of Johnny Hastings box set.

He did not stop until her bottom blazed and he had slapped every inch of flesh visible in the window of her pantalets. Then he pulled her to stand, cupping the heated cheeks in his hands. She whimpered, though not from pain, as he kneaded and smoothed circles over her