Desk work

As you place your back on the desk, Nonne pulls up her skirt slightly, revealing garters attached to the top of her stockings. She quickly and quietly unclasps each garter, and then deftly pulls off her panties, kicking them aside. She refastens each garter, and straightens out her skirt. Still in her heels, Nonne steps onto her chair and up onto her desk, so that she is standing on it, towering above you, her feet planted on each side of your hips. You try and peek up underneath her skirt, but can't see much in the shadows.

"Don't move," Nonne commands, from her lofty stance above you. "Clearly, you lack grace -- that much can be seen from your abysmal display at the chalkboard. So, it will be easiest if you do not move at all." Nonne squats down, and with one hand, holds your cock upright so that she can slide it into her uncovered pussy. She does this firmly and quickly, with as great of efficiency as she conducts all her movements. She leans forward, placing her palms on the desk next to your ears, and fully engulfs your dick, her wetness coming all the way to its base.

Without a pause or so much as a word, she begins to pump her abdomen up and down, fucking you dispassionately. Her skirt rustles, but hangs down in such a way that you cannot see anything going on down below. You look up at Nonne's face, and she is looking back at you, without any expression. Her grind is rhytmic, but syncopated in such a way that, combined with the strange, almost robotic look to Nonne's face, you do not immediately cum in her, as you thought you might. Instead, she fucks you like this for several long minutes, her pace increasing almost imperceptibly as she continues. Suddenly, Nonne's eyes roll back into her head, and she leans back, sitting down on your cock, grabbing a tit with one hand, and rubbing her clit at a blurry speed with the other. She orgasms silently, but you can feel her muscles clenching on your cock. Eventually, she stops frigging herself, and stands up, again towering over you.

"What to do with you, now?" she muses quietly, as she steps off the desk to the chair and then the floor, and straightens out her shirt and skirt.