Janet checked the clasp of her garter-belt’s strap one last time. She wanted everything to look good for Him. No, not good, perfect. She pulled on the strap and let it snap against her thigh with a satisfying clack. A delicious shiver ran up her spine at the thought of His eyes running up and down her long legs clad in their dark stockings, of His gaze admiring her lacy corset and the smoky make-up look that she had spent an hour perfecting. She imagined His hands caressing the small of her back, tracing lines across her legs, the nape of her neck. She dreamt of His lips kissing her neck, her chest, and of His teeth biting her lips, teasing her with promises of pleasures to come.
She checked herself in the mirror one last time. Getting dressed in the office’s bathroom was not the most ideal of situations, but when you were having an affair with your boss, some sacrifices had to be made. Besides, He treated her really well, and that was not just the mind-bending sex. What could she say? A man who knew what he was doing was worth all the trouble, the secrets, the lies… And the fact that she found herself in a company bathroom at eleven at night wearing a rather naughty lingerie ensemble. She smacked her lips after applying a last touch of red to them. She was ready for Him.
Her heels click-clacking on the floor, she made her way to her boss’ office. The workspaces around her were dark, save the glow of a few computer screens that had not been turned off. Through the large windows beyond, she could see the lights of the skyscrapers of the city below. With a frisson of naughtiness, she wondered if a late-night worker in another building would catch a glimpse of her hips swaying in her skimpy outfit. Smothering a giggle, she placed her hand on the doorknob and knocked softly. She opened the door.
The office was dark. He did like the theatricality of it. It was part of His charm, really. He would always make her feel like every part of their secret time together was lifted from the pages of a book. Every minute an adventure, and she always loved the endings. The thought made her smile. The lights suddenly turned on, and she smiled broadly, her hand shooting to cover her eyes.
“Ooh!” she purred, “You surprised m—”
She cut herself short when she saw that the person sat behind the large oak desk was not her boss at all. It was…
“Sally? W-what are you doing here?” she asked, an arm covering the ample bosom that her corset flattered. The attempt at modesty was somewhat defeated by the rest of the outfit, frilly panties and all, but her mind was busy racing to find anything to say, and trying to understand why Sally, her boss’ personal assistant, was sitting there instead of Him.
“Hello, Janet,” Sally said, with venom in her voice as she spoke her name. “I was hoping to have a chat with you…”
“A… chat?” Janet asked, troubled by the other woman’s commanding tone. She was nothing like the demure, discreet assistant that she was used to seeing during the day.
“Yes… A chat. You seem surprised to see me here? Maybe you were expecting someone else?”
“I think you already know…” Janet answered, blushing. Her secrets didn’t seem so well guarded after all…
Sally got up from behind the desk and walked to her. With a smirk, she looked up and down the embarrassed younger woman.
“Yes. I’m afraid Jim won’t be coming… He has a dinner tonight,” Sally said after an uncomfortably long silence.
“D-does he?” Janet stuttered.
“Yes, he does… With his wife.”
Janet said nothing. Right. Think, what could Sally want? Money? She wasn’t particularly rich, but He had made her gifts that she could sell for good money. Maybe Sally would stay quiet for that pair of diamond earrings that He had gotten her last time. Think, think! She needed to stall for time.
“Did… did she send you?” she asked, “Does she know about… this?” she pointed to herself and to her outfit as she said the last word.
“What?” Sally scoffed, “That stupid frigid hag doesn’t know anything, nor does she care, really.”
Janet gasped, and Sally went on: “As long as he keeps her bank account well cushioned, I don’t think she gives a damn what he does, really. Or who.”
“But then… What’s all this? Why are you here? And… What do you want?”
Sally came closer, glaring. She frowned and cusped Janet’s chin between two fingers.
“Jim is mine,” she hissed, “and he has been mine for much longer than you have even worked here.”
“Wh-what?!” Janet said, blushing at her other woman’s touch.
“I’ve been his mistress for years and I’m not about to let him ruin everything for some bimbo who thinks dressing like that is what he likes!”
Janet was too stunned to speak. Sally? Sweet, boring, in-the-background Sally? She couldn’t imagine Him with her, no. No. That was a lie, it had to be! Janet had been seeing Him for over a month, she would have noticed something, she…
“I won’t let you have him,” Sally said again, “and I’m going to teach you a lesson…”
Without another word, her hand flew to Janet’s ear, and she was dragging her towards the desk. With cries of pain, Janet followed.
“Stop! What are you doing!” she moaned, to no avail.
“I’ll show you what little sluts like you deserve…” Sally muttered through gritted teeth. Sitting down in His chair, she forced the younger girl over her knees.
“You can’t be serious!” Janet protested, incredulous, “who do you think you—”
The first slap landing on her ample bottom broke her train of thought. It hurt! She kicked her legs and tried to get off, but Sally was surprisingly strong, and, peppering her bottom with one hand, she held her firmly with the other. Within seconds, the pain seemed to spread, and Sally was not stopping.
“You can’t do this!” Janet cried out, somewhat unconvincingly. Her eyes were tearing up as her bottom was warming, and she tried to cover it with her hand. Scoffing, Sally pushed it away, and it only made her spank harder. The panties, as nice as they were, offered little protection against the ire of the scorned woman.
“Jim deserves the best,” Sally said, “and I always make sure he gets it…”
“Well, then,” Janet said defiantly, “then you should let him have me, rather than having to deal with your saggy tits…”
Silence. The slaps stopped as both Sally and Janet fell silent. The latter couldn’t believe that she had just said that. The former stunned into apoplexy that this girl, this airhead, this slut would dare talk to her like that.
“You did NOT just say that,” she roared, and grabbed Janet’s panties to lower them down to her thighs. “I’ll show you just what you deserve…”

The slaps fell fast and hard, as did the scolding, the belittling, the insults. Clearly, Janet had unknowingly struck a nerve. Unfortunately for her, she was in too much pain to appreciate it. Her bottom was burning, her sit spots were on fire, and Sally was not stopping. Tears were now running down Janet’s face, and she didn’t know how this was all going to end.
“Please…” she begged between two sobs, “I’ll do whatever you want…”
“You won’t see Jim again?” Sally asked, holding her hand up menacingly.
“Well, I…” Janet hesitated. Sally hand slapped her offered bottom once again.
“Shouldn’t He get to decide?” Janet sobbed, “Why did He get with me in the first place, huh?”
“He…” Sally hesitated, “He can be like that, sometimes… He gets distracted…”
Janet waited for the slaps to come. The silence stretched. Taking deep breaths to try and calm the raging fire in her behind, she asked:
“Has… Has this happened before? I mean, am I the first one that—”
“No.” Sally cut her, bitterly. “No, you’re not the first… mistake… that he made. I had to… Correct some other girls’ silly ideas… Like I said, he gets distracted…”
She fell silent once more. Janet didn’t dare move to soothe her blistered behind, for fear that the other woman would start spanking her again.
“But…” Sally began, “He always comes back to me…”
Janet could hear the hurt in that voice, the slightest twitch of regret. Her hatred of the other woman seemed to fly away in that instant.
“Oh, Sally…” she said, moving to get up. The older woman said nothing and didn’t stop her. Janet stood up in front of her tormentor, her hands unconsciously flying to clutch her bruised bottom. She winced, then looked at Sally. Tears were running down her face as well.
“Oh, Sally…” Janet said again, and against all instincts, she took the woman in her arms.
“Sally, you deserve so much better…”
“I don’t want better,” Sally sobbed, “I want him.”
***
In the end, it turned out that when both women brought proof of what Jim had been doing for all these years, his wife did actually care about it very much. Far form the stupid, pampered bimbo that Janet had imagined from Sally’s description, his wife had been generous and empathetic. Most importantly, she had gotten mad at him rather than at the other women. As the high-profile divorce made headline for months, all three women found themselves forming an unexpected friendship, and saw each other often long after.
More surprisingly still, Janet found herself over Sally’s lap again, numerous times. That night in the office had opened doors in her that she hadn’t known existed, and she had been eager to cross that threshold again, but with a friend, a lover, that time. Sally, it turned out, had been just as eager.