It’s rare to see a bare fisted punch in femdom pornography. That’s not to say it doesn’t exist, but it’s certainly not as common as slapping or pinching. I’d guess that’s because it’s quite hard to scale gradually. Too soft and it’s not noticeable. Too hard and you could so some serious damage. Not to mention the risk of also hurting the hand of the domme.
I found the image below on the femme fatale tumblr site. There was no background information, but it looked much more like a fashion shot than a porn shot. The magical website tinyeye quickly told me this was the model Rosie Huntington Whiteley, and a bit more digging got me to the entertaining film this image was taken from. It’s an Agent Provocateur advert, and worth checking out if you happen to enjoy gorgeous models with English accents wearing expensive lingerie while tying men up and teasing them. I’m going to guess that covers 99% of my readers.