“Three is the smallest number required to make a pattern.” The professor is delivering his last lecture of the year. “There are many examples: In physics, Newton’s three rules of motion. Music, the three-note building blocks of harmony. Most religions have versions of the Holy Trinity. Thirds are the basis of composition in art and photography. The three-act structure of films and plays, the list goes on…”

All potentially fascinating, but Jade is only half listening. Partly because she can not see how this connects to her company course,

mainly because a salacious fixation with the professor has long dominated her imagination. What is it about older guys? There are certainly three things she’d like to indulge with him…

The professor catches her eye, obviously aware she’s daydreaming, and frowns. Jade blushes, guiltily tries to concentrate. After class she hangs around until they’re the only two left in the lecture hall.

“That’s it,” he jokes, “taught you all I know. Although for a star student you seemed to have trouble focussing on that last presentation?” The professor is standing close to Jade, very close, an unmistakably male presence. Something pheromonal is happening.

“Perhaps I need a tutorial?” Jade ventures tentatively.

“Alas the academic year is over,” her lecturer responds crisply. Her crestfallen look does not escape him. There’s more to this request than a thirst for knowledge. The professor’s at all times been careful not to date with students, however, as of tomorrow, Jade is no longer a pupil and he’s on vacation. Both are independent adults – should they choose to meet who could object? Best make it a clandestine assignation though.

“Perhaps I could manage a private tutorial. I warn you my standards are exacting and teaching methods unorthodox. Since you’re lacking self-discipline, I can impose some rigour. Are you prepared for that?” The sexual tension between them is palpable.

“Yes,” she replies decisively, “I am. Thank you.”

“Then prepare for an intensive session on the rule of three.” He scribbles an address and time on a piece of paper – prudently leaving no digital footprint. “See you tomorrow. Oh, and outside of work my name is Paul.”

Jade looks around the room, it feels familiar, dominated by a large and sturdy table. Elsewhere in the building a clock strikes; only then does she notice Paul, standing by the window in silhouette, backlit by autumn sunshine.

He nods approvingly in recognition of her presence, walks to the table and picks up a wooden ruler. Flexes it, all the while keenly observing her expression. Jade strives to appear unruffled, suppressing swirling inner emotions of trepidation and uncertainty. Clasps her hands together to stop their nervous shaking. She’s wearing a knee length skirt, blouse and flats, unintentionally seductive in their demure concealment.

“So, you agree I’m in charge?” In contrast to her evident jitters Paul is relaxed and authoritative. Jade nods in mute assent, can not trust herself to speak. ” When I tell you to do something obey immediately; don’t reply, simply comply.” He’s clearly choreographed this encounter in advance, the leader and the led.

“Begin by getting onto the table and lie face down.” Not what Jade was expecting and an awkward instruction to accomplish with either dignity or modesty. Consequently, Paul witnesses alluring flashes of thigh as she clambers onto the tabletop. This is, she thinks, at once difficult, humiliating and incredibly exciting. Jade grips the far end tightly and lies prone, tense with expectation. Paul tugs up her skirt. “I don’t care for tights,” he observes mildly, the implicit message: do better next time.

Presses the ruler again her panty-clad buttocks, tests its bendiness against the delightfully springy skin of her bottom cheeks. Fuller than her slender frame might lead one to suppose, a glorious vision.

Without preamble Paul bring the ruler down sharply, spanking the broad expanse of her buttocks. Jade gasps, initially nonplussed. By the third stroke the sting makes itself abundantly felt, even with her bottom covered. Shocked, she squirms on the tabletop until the salvo ceases abruptly as it began.

“That should assist your concentration. You may get up.” Jade’s scramble off the table is as undignified as was climbing on. She risks a look at her burning bottom, blush pink through the thin material, radiating heat.

“Rub if you wish,” says Paul. Jade bloody well does wish, nevertheless aware of a sharp frisson of sexual arousal. “Leave now, be back at three on the dot.” Jade does a double take, she’s barely arrived, how to occupy the following forty-five minutes?

The answer is a cup of black coffee in a nearby cafe. She’d prefer a proper drink, not a wise idea under the circumstances, imagine Paul’s reaction if he smelt alcohol on her breath. A wondered occurs; they’ve not even kissed. Jade momentarily considers her options, she’s under no obligation to return. This is an exercise in freewill, personal choice. She shifts uncomfortably on her chair, sore derriere smarting. So easy to quietly tiptoe away. On the other hand, if that was the first lesson, what might the others have in store? A fire has been lit. Inevitably she returns.

“Good of you to be prompt.” Jade’s mind is mass of contradictions. She’s fantasised about this moment since yesterday, last night masturbated to fantasies of coercive control. Dreamt of a man she can trust to know her limits and push them just a fraction further.

“I didn’t want to displease,” she whispers, adopting a suitably penitent pose.

“I doubt you could ever do that,” Paul replies. Jade squeezes her thighs tightly togther to suppress a rush of arousal and blushes; looks enquiringly at him.

“Kneel on the chair.” Once more the instruction is brusque. “Pull your skirt up, slowly.” Jade obeys, tantalising revealing taut thighs, sensually prolonging the task until her silk clad behind is fully displayed. “Knickers down to your knees,” an erotic tour de force. Paul surveys her bare bottom like a connoisseur. “Quite delightful. Lean forward, and push out that naughty rear, I want to see exactly what I’m dealing with.”

Jade’s legs are bare, she knows it’s the current fashion but as a fair skinned woman hopes they don’t look too pale. Paul’s hand caresses her flanks, a soothing interval suddenly ended by the ruler. Her bare buttocks are thoroughly smacked, previous marks soon overlain. It stings so much more on the bare and Jade weaves and squirms animatedly.

Mercifully Paul pauses the chastisement, instead sliding an exploratory digit along her moist pussy lips. Carefully parts the dewy folds and finds her aching clit.

“Would you like to come, or shall I make you wait?” Paul muses, sensing the urgency of her need.

“Now please,” implores Jade.

“Very well, a reward for your compliance,” Paul adroitly employs his fingers to quickly bring Jade to climax, just enough to ease her frustration. A petit mort, during which she loses a shoe,

“Tut,” mutters Paul, pretending displeasure, but entranced by her perfectly painted nails and cute silver toe ring. He slaps the ruler across the sole of her pretty foot, eliciting a yelp of surprise and pain. “Into the corner, young lady, hands on head and no rubbing. The third part of your punishment commences in fifteen minutes.” Jade dare not risk rubbing her sore bottom. A clock ticks metronomically, her imagination runs wild.

At the appointed hour Paul steers Jade back to the table and turns her to face him, tender posterior chafing sorely against the edge. Admires her pussy, peaking damp and slightly agape at the apex of her thighs. Undoes the prim blouse to lift pert boobs from the confines of a lacy bra. Semi clothed is so much more erotic than completely nude. Her nipples stand erect, he takes each in turn into his mouth, kisses, sucks, gently bites. A moan escapes Jade’s lips, her face and neck flush with pleasure.

“Open your legs, display yourself.” Apprehensively she shuffles her feet wider. As if by magic the wretched ruler reappears, along with a dangerous glint in Paul’s eyes. Jade grips the table tight, wincing as he smacks her boobs, stinging the under curves. Paul cups her chin, forcing Jade to look directly at him.

“This,” he announces, “is the finale. Any disobedience and we begin from scratch. Clear?” Jade nods mutely, adrenalin surging, transfixed. He rests the ruler on her inner thigh, Jades eyes widen as she realises the intention. “Rule of three remember?” he says softly. “Count each out loud.”

“I will.” Summoning reserves of inner strength Jade’s answer is determined, voice newly confident.

“One.” A red line slowly appears on white skin. Another stroke to opposite leg. “Ow, two,” a hint of desperation in Jade’s response. Can she endure this ordeal? “Three.”

“Well done,” Paul’s cock discernibly strains against the confines of his suit. He rests the ruler’s tip against her mons. “Guess how many?”

“Three, uncowed, despite her stinging thighs.

“Correct, ask me for them.” Paul can’t be serious, oh he is. Jade takes a deep breath, voice dropping an octave.

“Please punish my naughty pussy, sir.” Each impact is like an electric shock, Jade dips her knees, writhes and gasps. He steadies her, they exchange a lingering kiss.

“No more punishment,” she pleads. “I want you to fuck me.” Paul frees his cock, presses it against Jade’s swollen vulva. It enters easily. Feels so good to have him inside, she pulls him forward, taking the entire length, unabashed in her lust.

Paul fucks her with long slow strokes, lifts Jade into a seating position to penetrate more deeply. Their coupling is savage, abandoned, violent in intensity. She meets every lunge with a counterthrust of her own, a series of escalating carnal collisions. At some point both come copiously; fingernails digging into bruised skin. Yet neither immediately halts, carried on by sexual momentum to another orgasm. Eventually the pair part, limp from exhaustion, utterly spent. Lesson given; lesson learnt.

“Think you find out the rule of three?” He smiles sardonically, true to form the professor is back on topic.

“I’ve grasped the concept, perhaps in future we could focus on the detail?” responds Jade, enigmatically. “Applied instruction may be required…”

“I’d need to devise a bespoke educational programme for you,” ponders Paul. “Something mutually beneficial, an alternative post graduate syllabus.”

“I promise to be an assiduous and very grateful student.”