Master David is pissed off because his slave girl Kitten acts like a slut when he takes her out to parties. So he has to punish her. And though the punishment looks quite severe at times, Kitten seems to know that she deserves it and obediently submits.
The tit torture seems pretty rough, and when David cuts off her circulation there with ropes, Kitten's breasts turn cherry red. Kitten gets stretched on the rack as well, and that doesn't look too comfortable for her. But perhaps the hottest part is when David puts a leash around her neck, makes her crawl around on all fours, bark like a dog and then sniff his butt.
Kitten definitely enjoys herself when David fingers her clothespin-laden pussy.