This is an interesting premise, but the details are vague. I think the story could use with some fleshing out. The back ground can stay simple(though a little more detail there wouldn't hurt), but the action needs more description. Build up, what is the girl feeling? Here is an example of what I'm talking about: They dragged the girl to the center stage. She pleaded, tears streaming down her face. When she saw the brazier with the branding irons heating in it, she became frantic. She thrashed and struggled as much as her petit frame could. One of the guards backhanded her across the face, stunning her long enough from them to rip her blouse open. Her large tits sprang forth, slapping loudly against her stomach....

See, flesh things out. Keep writing, it takes practice. Cheers.