At my whisper, she threw her head back, a sharp, angular motion. Surprising me, she twisted away so that her bum ground against me. Her wet lips brushed my trousers. She was radiating heat, even through the fabric. Quickly, I pushed her back against the desk.
"Oh my, that was unwise, miss," I growled into her ear. "Now you will pay. You, your bum and your slick wet lips." And, to underline her mistake, I emphasized each word with a hearty slap on a bum cheek. The first few were light and playful, increasing in force with every subsequent one. At first she just wiggled her bum. Once, twice.
Then, her flinches grew more frenetic and she started begging again, "Oh, please, sir, no. Not that hard. Anything, please not that hard."
I leaned to her ear. "Anything?" just as my hand landed another slap on her right bum cheek. This time, I let it travel caressingly over her bum, pressing against her cheeks, reveling in their redness, keeping her very aware of the possibility of another slap. "Yes, sir. Anything. Please. Just don't spank me again." Her voice was wobbly, almost sobby. For a change, she kept her bum very still - I could and did allow my hand to wander, caressing this cheek, then the other and, oh, did they burn. Palm and finger imprints will be visible on her awhile yet, I snickered to myself. She will not play this way again, not with me.
"If you want not that hard, maybe you should have thought of that before peeping. Did you?" She just shook her head, wordlessly. "Now, miss, I think it might be time for your... atonement for some of your peeps. Do you have an idea what would be an appropriate... punishment?" She nodded, after all - what else could she do.