In the dim morning light, Sarah and Mark lay entwined in their shared bed, the cotton sheets twisted around their legs. Sarah's hand, warm and soft, gently wrapped around Mark's hardening cock, her fingers teasing him with slow, deliberate strokes.

"Mark," she whispered, a mischievous glint in her eyes, "I must tell you something. When Sandra wore that short skirt to school yesterday, I took a leather strap to her bottom." She licked her lips as Mark's breath hitched, his curiosity piqued.

"Really?" Mark asked, trying to keep his voice steady.

Sarah nodded, taking pleasure in seeing his reaction. "Mmm, yes. Her skirt was so short that it offered no protection when I had her across my knee. Every time I spanked her, my hand hitting her bare skin filled the room." She watched as Mark's cock grew harder in her palm, and she tightened her grip ever so slightly.

"Tell me more," he murmured, his cheeks flushing excitedly.

"Her panties were skimpy too, barely covering her bottom," Sarah continued, a wicked smile on her lips. "I made her touch her toes and spread her legs wide for the strapping, exposing her completely. The welts from the leather strap left her bottom red and welted, visible even through her thin panties."

As Sarah spoke, emphasizing the word "spanking" throughout her story, she felt Mark's erection grow increasingly rigid in her hand. She revelled in her power over him, knowing how much he loved being dominated by her.

"Mark, I really enjoyed spanking and strapping Sandra's bare bottom," she confessed, giving his cock a firm tug with each mention of "spanking". Unable to resist longer, she straddled him, guiding his throbbing length inside her as they both moaned in pleasure.

"Before I go to work today," Sarah panted, her hips grinding against his, "I want to take the leather strap to your bare bottom too." She rode him harder and faster until they both reached their peaks, their bodies shuddering together in ecstasy.

Flushed and breathless, Mark sheepishly agreed to be strapped just like Sandra, bending over the bedroom chair as Sarah dressed for work. She strapped his panty-covered bottom before pulling down his pants, instructing him to open his legs just as Sandra had. With every crack of the leather on his skin, Mark couldn't help but feel a mixture of humiliation and arousal at the thought of Sandra coming to spank him on Saturday.

Later that day, Sarah excitedly shared her morning escapade with Sandra, knowing how much she would appreciate the intimate details. The two women chatted animatedly, Sandra asking questions about the strapping while Sarah admired her friend's knee-length skirt.

"Is your bottom still sore from yesterday?" Sarah teased, raising an eyebrow.

Sandra giggled, touching her skirt playfully. "A little, but it was worth it. And I'm really looking forward to spanking Mark this weekend."

As they continued talking, Sarah felt a thrill run through her – a secret shared between friends, a power dynamic that made her heart race. The anticipation of what was to come only heightened her desire, and she knew that Saturday couldn't come soon enough.

---------------------

Sarah found herself in Sandra's study after lunch, watching with amused curiosity as Sandra took Thomas, an eighteen-year-old student, across her knee. With a firm hand, Sandra spanked the boy's panty-covered bottom, each slap echoing through the room.

"Is this how you're going to behave at school?" Sandra scolded him, her voice stern but with a hint of playful satisfaction. She continued spanking Thomas's bottom, the fabric of his pants stretched tight over his reddening cheeks.

Thomas whimpered, squirming under Sandra's punishing hand. "No, Miss," he muttered, embarrassed by the situation.

"Good," she replied, yanking down his pants to expose his bare bottom. Thomas gasped, instinctively trying to cover himself, but Sandra held him firmly. Sarah watched, captivated by the raw power dynamics playing out before her.

With renewed vigour, Sandra spanked Thomas's bare bottom until it glowed a bright red. Eventually, she stopped and made him stand facing the corner of the room, his sore backside on display for both ladies to observe.

"Stay there and think about your actions," Sandra commanded, winking at Sarah as if to say, 'Look what I can do.' A thrill ran through Sarah – a secret shared between friends, a power dynamic that made her heart race.

After a few minutes of corner time, Sandra approached Thomas to pull up his pants. To her surprise and anger, she discovered the boy's erect cock. "You shouldn't be enjoying this, Thomas!" she snapped, her face flushed with indignation.

In response, Sandra gave him another swift spanking, then retrieved a cane from the cupboard. She delivered six sharp strokes with stern efficiency, leaving Thomas sobbing and begging for mercy. Satisfied that his arousal had subsided, Sandra ordered him to stand and show both ladies his now-flaccid cock before dismissing him.

"Phew, that was intense," Sandra confessed to Sarah once Thomas had left, her eyes sparkling with satisfaction. "I needed some practice before dealing with Mark this weekend."

Sarah couldn't help but feel sympathy for the young schoolboy, who had been unknowingly chosen as Sandra's guinea pig. But the anticipation of what was to come only heightened her desire, and she knew that Saturday couldn't come soon enough.

---------------------

Mark awoke beside Sarah on Saturday morning, anxious about Sandra's impending visit. He tried to change Sarah's mind one last time as they lay in bed together.

"Please, do we really have to go through with this?" he pleaded, looking into her eyes with fear and desperation.

"Mark, don't be such a baby," Sarah chided, rolling her eyes. "You're getting your bottom smacked by Sandra today, and that's final."

As his situation settled in, Mark couldn't help but feel a strange mix of apprehension and arousal at the thought of Sandra soon arriving to spank him.

"By the way, Mark," Sarah said with a wicked grin, "once Sandra's done spanking you, I might just have you lick her pussy. How does that sound?"

Mark's face turned bright red as he stammered, "Wh-what? You can't be serious..."

"Of course I'm serious," Sarah replied playfully, enjoying the look of shock on her husband's face. "I bet you'd love to taste her while she's still all worked up from spanking your naughty bottom."

"Sarah, please..." Mark pleaded, but Sarah merely raised an eyebrow in response.

"Get used to it, Mark. Today will be quite an experience for both of us," she said firmly, leaving no room for negotiation.

Before Mark could muster any further protest, Sarah left the room, returning moments later with a bundle of clothing in her arms. She unfolded the garments and held them up for Mark to see – a schoolboy uniform complete with a white button-up shirt, tie, and a pair of very short shorts that would expose his bottom cheeks.

"Remember this?" Sarah asked teasingly, recalling their previous role-playing adventures. "Today, you're going to wear this for Sandra. And I have another little surprise for you, too."

Mark gulped as Sarah produced a pair of silky men's bikini panties, holding them up with a smirk. "You'll be wearing these under your shorts. I don't want your little uniform or underwear offering any protection when Sandra spanks you."

"Sarah, do we really have to–" Mark began but was silenced by Sarah's stern gaze.

"Enough, Mark. Get dressed. Sandra will be here soon, and I expect you to be ready."

With a heavy sigh, Mark reluctantly took the uniform and panties from Sarah, feeling a mixture of dread and excitement coursing through him as he imagined what the day had in store.

As he changed into the outfit, Sarah couldn't help but admire her handiwork. The short shorts and silky panties would undoubtedly provide the perfect canvas for Sandra's disciplinary attention. And as much as she knew Mark was nervous, Sarah could see that deep down, he, too, was eager to experience the thrill of submitting to both women.

Mark, now dressed in the schoolboy uniform and the silky bikini panties, fidgeted nervously as Sarah paced around the room, deep in thought.

"Where should you be when Sandra arrives?" she asked, tapping her chin. "I could have you across my lap with the door open, but I think that might be too obvious."

Mark's heart raced at the image of being found in such a vulnerable position, but he remained silent, not wanting to incite Sarah's ire.

"Ah, I've got it!" Sarah exclaimed suddenly, snapping her fingers. "You'll stand in the corner, shorts pulled up tight, like a naughty boy awaiting his punishment."

As Mark reluctantly shuffled towards the corner, Sarah adjusted his shorts, pulling them up snugly to emphasize his exposed bottom cheeks. She then stepped back, admiring her handiwork before turning her attention to preparing herself for Sandra's arrival.

"Bend forward and push out your bottom. Stay right there," Sarah ordered, leaving Mark anxiously waiting in anticipation.

The minutes felt like hours as Mark stood in the corner, the tension building within him until he heard the sound of the front door opening and Sandra's voice floating through the house.

"Sarah, darling, I'm here!" she called out, excitement evident in her tone.

"Come on in, Sandra!" Sarah replied, her own enthusiasm matching Sandra's. "You're just in time."

Sandra entered the room, dressed in a daringly short dress that barely covered her thighs, and smirked when she saw Mark in the corner. "My, my, isn't this quite the sight? It seems someone's been very naughty."

"Indeed," Sarah said, lifting her dress to reveal her black lace panties. Positioning herself on the edge of the bed. "Now, let's begin, shall we?"

Sarah guided Mark across her bare thighs and began spanking him across his shorts. "You've been a bad boy, haven't you, Mark?" she scolded as her hand connected with his exposed flesh.

"Y-yes," he stammered, his face flushing with embarrassment.

"Across Miss Sandra's lap, young man," Sarah said sternly.

"Good," Sandra chimed in, stepping closer. "Now, let's see what's underneath these shorts."

Lowering Mark's shorts, Sandra revealed the silky panties that barely covered his bottom. She could feel his erection pressing against her thigh as she led him over her lap and started spanking him, each smack sending shivers down his spine.

"Such a naughty boy," Sandra taunted. "I can't believe your wife has to call me to deal with you."

Mark squirmed under their combined gazes, unable to find the words to respond. His mind was a whirlwind of conflicting emotions - humiliation, arousal, and something else he couldn't quite place. He wondered if Sarah could see this turmoil within him or if she was simply focused on the task.

"Are you enjoying this, dear?" Sarah asked Mark, her voice dripping with honeyed sweetness. As she watched Sandra continue to spank his exposed bottom, Sarah couldn't help but feel a thrill of excitement surge through her body. Biting her lip, she slipped a hand beneath her black lace panties and gently rubbed herself.

"Y-yes," Mark moaned, his face flushed red from the spanking and the humiliation of admitting his arousal.

"Good," Sarah said, smirking at her husband's predicament. "Now let's see how you handle something more... severe."

Sarah walked over to the dresser, picked up a cane, and swished it through the air menacingly. "I think it's time we moved on to the cane, don't you, Sandra?"

"Absolutely," Sandra replied, her eyes sparkling with mischief. "Let's see just how well he can take it."

"Mark, I want you to touch your toes for me," Sarah instructed, tapping the cane against her palm. "And spread your legs wide so Sandra can have fun too."

Mark hesitated momentarily, glancing at the two women nervously before complying. With his legs spread and bottom thrust outwards, he presented the perfect target for Sarah's cane. She wasted no time in bringing it down across his thin silk underwear, eliciting a gasp of pain from him.

"Very nice, dear," Sarah cooed, watching Sandra reach between Mark's legs to stroke his balls. "You're being such a good boy for us."

"Please," Mark whimpered, his breath hitching as Sandra continued toying with him while Sarah's cane left stinging welts across the silk of his panties. "Please, harder..."

"Is that what you want, my love?" Sarah asked, feigning innocence. In truth, she was just as eager to increase the intensity of their play. She brought the cane down again, slightly lower. "Do you want us to cane you harder?"

"Y-yes," Mark moaned, his voice shaking with desire and anticipation.

"Your wish is our command," Sandra said, grinning wickedly at Sarah as she grabbed the waistband of Mark's panties. With a swift tug, she pulled them down, leaving him completely exposed.

"Such a pretty sight," Sarah murmured, her arousal mounting as she watched Sandra position herself behind Mark. "Are you ready for this, darling?"

Mark nodded, unable to speak as he braced himself for the first stroke of Sandra's cane. It came hard and fast, bringing a cry of pain to his lips, leaving a bright red welt across his bare flesh. And yet, even as he winced, he couldn't help but thrust his hips back, seeking more.

"Mark, darling," Sarah purred, eyeing Sandra's hips as she swayed seductively in her white satin panties. "I want you to pleasure Sandra now."

Sandra smirked at Mark, her dark eyes gleaming with mischief. "You heard your wife, Mark. Get on your knees and lick my pussy through these panties."

Mark hesitated momentarily, his eyes darting between the two women before sinking to his knees before Sandra. He leaned forward, tentatively running his tongue along the damp satin that concealed her most intimate area.

"Good boy," Sarah murmured, watching Mark's submission delightfully. Her arousal grew stronger, her fingers itching to touch herself again.

"Ah, that's it," Sandra moaned, her fingers tangled in Mark's hair, guiding him as he lapped at her through the thin, soft fabric. Her breath came in ragged pants, her body trembling with desire. "Just like that, Mark. Don't stop."

"Such an obedient husband," Sarah mused, her hand slipping back into her panties as she fingered herself again. The sight of her husband pleasuring another woman only heightened her excitement.

"Sarah, I'm so close," Sandra gasped, her legs beginning to quiver beneath Mark's ministrations.

"Stop, Mark," Sarah commanded suddenly, her voice firm yet sultry. Mark immediately obeyed, pulling back from Sandra, who whimpered in frustration.

"Get up and bend over the bed, Sandra," Sarah instructed, retrieving the cane from where it lay discarded earlier. "Legs wide apart, just like you had Mark. Mark, you kneel before Sandra's pussy and get that tongue back against her satin panties."

Reluctantly, Sandra complied, draping herself over the edge of the bed, her soaked panties clinging to the curve of her bottom. Mark resumed his position, licking her eagerly through the satin panties as she presented herself for punishment.

"Such a naughty girl, Sandra," Sarah whispered, her breath hot on Sandra's ear. "And naughty girls need to be punished."

With that, Sarah brought the cane across Sandra's panty-clad bottom, the impact echoing through the room. Sandra gasped, her body tensing at the sudden sting, but Mark never wavered in his efforts to pleasure her.

"Ah, yes," Sandra moaned, her body writhing under the combined sensations of pain and pleasure. "More, please, Sarah."

"Of course," Sarah replied, her voice laced with desire as she continued to cane Sandra. With each crack of the cane, her arousal grew, her fingers moving faster within herself while she watched her husband eagerly service Sandra.

"Mark," Sandra panted, her body trembling on the verge of orgasm. "Don't stop, I'm so close."

"Harder, Sarah," Sandra begged, her voice desperate and filled with lust. Sarah obliged, increasing the force of her strokes until Sandra finally cried out, her body shuddering as she climaxed.

"God, yes," Sarah moaned, feeling her own orgasm approach as she continued to finger herself. She could see Sandra's body convulsing with pleasure, her panties soaked with her arousal and Mark's saliva. The sight pushed Sarah over the edge, and she came with a cry, her body trembling with ecstasy.

As their orgasms subsided, Sarah and Sandra exchanged a heated glance, their eyes filled with primal satisfaction. They had taken control and dominated Mark completely, leaving them both breathless and euphoric.

"Alright, Mark," Sarah commanded, her voice still heavy with satisfaction. "Go stand in the corner while we catch our breath."

Mark, his face flushed and bottom sore from the caning, obeyed without hesitation. The ladies collapsed onto the sofa, giggling softly in their post-orgasmic haze.

"God, that was intense," Sandra panted, her eyes shining with delight. "I don't think I've ever felt so alive."

"Me neither," Sarah agreed as they shared a look of conspiratorial pleasure. She could see the thrill of their shared power over Mark mirrored in Sandra's eyes. Their bond had grown even stronger, fueled by their mutual love for domination.

After a moment, Sandra opened them wide, still feeling the heat between her legs. "Sarah," she asked coyly, "would it be alright if Mark licked me again? This time, with my panties off?"

"Of course," Sarah replied, watching her husband in the corner, his reddened bottom on display. "But make sure he does a good job, alright?"

"Hey, Mark," Sandra called out, her voice dripping with seduction. "Come here, and show me just how talented your tongue is."

Mark approached the women hesitantly, but his desire to please them was evident in his eyes. He knelt before Sandra, gently removing her panties, exposing her glistening wetness.

"Make her scream," Sarah ordered, her arousal already reigniting. She began to finger herself once more, watching intently as Mark's tongue traced delicate patterns around Sandra's swollen clit.

"Ah...that's it, Mark," Sandra moaned, her body undulating in response to his skilled ministrations. "Just like that...oh, God..."

"Spank him, Sarah," Sandra gasped, her breathing ragged. "Make him feel it while he makes me cum."

"Are you ready, Mark?" Sarah asked, her voice full of authority. Without waiting for a response, she slapped his tender bottom with a sharp smack.

"Keep going, Mark," Sandra urged, her pleasure mounting as his tongue circled her clit more intently. "Don't stop. I'm so close..."

"Harder, Sarah," Sandra panted, her body quivering in anticipation. With each stinging swat, Mark's tongue worked faster, driving Sandra to the brink of ecstasy.

"Almost there, Mark..." Sandra's voice trailed into a guttural moan as her orgasm washed over her. She cried out, her back arching, as her climax ripped through her body.

"God, yes!" Sarah groaned, her fingers working furiously between her own legs. Watching Sandra reach her peak under Mark's expert touch only heightened her arousal, pushing her over the edge once more.

As Sarah's climax subsided, she smiled at her husband, kneeling between Sandra's thighs, his face damp with the evidence of their shared satisfaction. It had been an unforgettable experience, and one they all knew would be repeated in the future.

As Sarah and Sandra lay on the sofa, catching their breath and basking in the afterglow of their recent escapades, they shared a knowing smile. Mark stood in the corner, nursing his sore bottom and waiting for further instructions. Sarah's heart raced with excitement as she thought about the events unfolding.

"Sarah," Sandra began, her voice still slightly breathless from her climax, "I have to admit, I really enjoyed spanking Mark today."

"Me too," Sarah responded, her eyes twinkling with pleasure. "There's something so exhilarating about having control like that."

"Definitely," Sandra agreed. She glanced toward Mark, who remained silent in the corner. "You know, I was thinking... Next week, you will visit your mother, right?"

"Uh-huh," Sarah nodded, curious about where this conversation was headed.

"Would you mind if I popped around one day while you're away? I'd love to spank Mark again, maybe even try some new implements on him," Sandra suggested, her cheeks flushing at the thought.

Sarah considered the proposal, mulling over the idea in her head. The thought of Sandra dominating Mark in her absence sent a jolt of arousal through her body.

"Actually, I think I'd like that," Sarah replied, her decision made. "As long as Mark is okay with it, of course."

"Are you up for it, Mark?" Sandra called out, directing her question to the submissive man in the corner.

Mark hesitated momentarily before responding, his voice quivering slightly, "Yes... I'm up for it."

"Perfect!" Sandra exclaimed, clapping her hands together in delight. "I can't wait. I'll make sure to send you some pictures, Sarah. You know, to keep you in the loop."

"Of course," Sarah agreed, relishing seeing her husband under Sandra's control while she was away. As Sandra and Sarah continued to discuss their plans for the following week, Mark couldn't help but feel a mixture of excitement and dread at the thought of being disciplined by the young teaching assistant once more.