Sammi watched helplessly as Marta was being doggy fucked on the bed right in front of her. She was gagged, and tied to a chair next to the bed, as a vibrator snuggled up to her clit and curved around inside her, clinging to her G-spot.

The vibrator seemed to be animated by a demon that was bringing her to the verge of cumming, then dragging her back, not once, but over and over again. And the demon seemed to know her innermost thoughts and feelings, because it kept dragging her closer and closer to her edge, then denying her.

It was torture – and she had begged for it!

~~~~~

The day after Marta had taken down Val Kanrith, James and Marta, Master and slave, sat together in the living room. They were talking, cuddling, and enjoying the afterglow of their recent mutual orgasms, plus the excitement of getting engaged.

James decided the time was right to return to an earlier subject. “Okay, so I’ve told you my fantasy – and I will search my libido to see if there are any others. Do you have any? Remember, this is – pardon me – tit for tat!”

Marta blushed, was silent for a moment, then nodded.

James waited, then said, “Are you going to tell me? Or are we going to play Twenty Questions?”

Marta took a breath, looked down and said, “Sammi,” referring to the seventeen-year-old woman they had recently included in a threesome.

James waited, then, “What about Sammi? Although she’s certainly toothsome enough.”

“I like…the idea of…” she paused, bit her lip, then said in a rush, “I want to do the kinds of things to Sammi that you do to me!” And looked down, blushing again.

James’s smile broadened. “You have hidden depths, don’t you? Okay, well, we’ll have to check with Sammi to make sure she’s onboard with it, but I certainly have no objection. ’Course, we’ll have to wait for next weekend, ’cause she came without permission.”

Marta looked at him, “Can’t we find some other way of punishing her? Please? Now that I’ve said it, I’m eager to do it!”

James sat back and thought for a while, then nodded, “I think I can come up with something. Why don’t you see if she’s free for supper and the rest of the evening?”

~~~~~

“Mom? I’ve been invited out for supper. Okay?”

“New boyfriend?” Sammi’s mom smiled at her precocious daughter.

“No. Well, not really. It’s one of our neighbors. Her name’s Marta and she lives on the seventh floor.”

“Oh, what’s her last name?”

Sammi shrugged, “I dunno. I met her and her boyfriend in the elevator a while back, and then helped her get ready for a big date a few days ago. They’ve invited me for supper at the last minute.”

Sammi wasn’t exactly lying, but neither was she telling her mother the whole truth.

“Hmm…” her mother said, “Let’s see if we can figure out who she is.” She took down the condo residents’ directory, and looked at the seventh-floor listings. You say her name is Marta? M-A-R-T-A?”

“Yeah, I think so.”

“Okay, here she is: Dr. Marta Rabinovich. Wonder what kind of doctor she is?”

Sammi moved over to her tablet and, looking over her mother’s shoulder for the spelling of Marta’s surname, typed it in and searched. “Okay, here we go…lemme see. She’s a doctor of… quantum physics? What? I thought she was a fashion model! She’s at the Institute of Advanced Study at Princeton. Wait, there’s a Wikipedia entry…mmmm…Oh shit!”

“What is it?” her mother asked.

Sammi just sat there looking at the screen with her hand to her mouth.

Sammi’s mother took the tablet from her and started reading. She smiled. “Seems your friend is one of the world’s top physicists and cosmologists. You sure can pick ‘em!” Her mother felt good. If Sammi was going to run wild, at least she was hanging out with good people!

“What?” her mother said, “What’s wrong?”

“I’ve been fucking one of the smartest people in the world. They must think I’m a complete asshole!”

“You’ve been what?”

~~~~~

Marta was in the shower when James heard a knock at the door, so he walked over and opened it. He was wearing a towelling robe, and nothing else.

At first, he smiled when he saw Sammi, then stopped when he saw an older woman with her. Based on the resemblance, he guessed it must be Sammi’s mother. He was used to thinking on his feet, so stuck his hand out and said, “Oh, hi! You must be Sammi’s mom, about whom we’ve heard so much. Come in.”

Sammi’s mother just looked at him. “And I’m guessing you’re the strange man who’s been fucking my daughter, right?”

James was quiet for a beat, then said, in a quiet voice, “I’m the man who is going to shut this door in about ten seconds. I’d suggest you decide which side of it you want to be on.” And waited.

Sammi’s mother took a deep breath, closed her eyes briefly, then stepped in, saying, “Thank you. May we talk?”

James nodded, and led the way to the living room. “Please take a seat. I’ll go make myself a bit more presentable. Marta’s in the shower, but should be out fairly soon.” And he walked out.

Sammi and her mother sat in uncomfortable silence until Sammi couldn’t stand it anymore, and said, “You always taught me to be polite and to keep my temper in check. How could you do that?”

Sammi’s mother just stared at her. Finally, she was saved from answering by James’ return, shortly followed by Marta.

Marta spoke first, “Hi, I’m Marta Rabinovich, and this is my friend, James. I take it you’re Sammi’s mother.”

“Yes, I’m Janet Fleming. My husband and I own a condo on the 12th floor. I’ll get right to the point. My daughter inadvertently let slip that she was fucking you – her words. I want to make sure she’s not being taken advantage of.”

Marta nodded. “Reasonable. What would you like to know?”

“Are you fucking my daughter?”

Marta blushed, but calmly said, “Yes. At least I have in the past, and would like to do so again in the future.”

Sammi beamed at Marta, then quickly wiped the expression off her face.

Janet Fleming looked at Marta, who stared coolly back at her, then Janet shifted her attention to James. “And who are you?”

James said, “I’m James Gainsborough. I’m an adjunct professor of mathematics at Princeton.”

Janet looked at him. “You look oddly familiar. Have we met before?”

James shook his head, “I’m quite sure we haven’t.”

“Then why do you look so familiar?”

James shrugged. “You tell me.”

“And have you been fucking my daughter as well?”

James gave her the Death Stare, then said, “I think it would be more accurate to say she’s been fucking me. Wouldn’t you agree, Sammi?”

Sammi nodded her head vigorously. “Mom, he’s amazing…”

“Not now, Sammi.”

Sammi looked troubled, then stood up. “Mom, you told me that after I was sixteen, what I did with my sex life was up to me. Yet, now you have barged in here, insulted my friends, and implicitly told me you don’t trust me.

“So, either you start behaving yourself, or we are going to leave. I will not have you insult either Marta or James any further.” And she glared down at her mother.

Janet looked coolly back at her daughter, then turned back to James and said, “Are you exploiting my daughter?”

James looked levelly back at her and said, “No.”

Janet stood up. “If I find you are, there will be hell to pay.” She reluctantly held out her hand, then said, “Forgive my being blunt. I was concerned for my daughter’s welfare.”

James stood up, took her hand, and said, “Madam, I well understand and completely agree with your reasoning. I only wish my parents had been as concerned for my welfare.”

Sammi said, “Okay, Mom, you’ve asked whether their intentions are honorable or not. May I please have supper with them now?”

Janet reluctantly nodded and turned to leave.

Then she turned back to James. “Wait. Did you say James Gainsborough?”

James sighed, then nodded.

“Any relationship to James Llewellyn Gainsborough?”

James nodded again, and said, “That’s me.”

“Oh, shit.” Janet sat down again.

Before anyone could say any more, Sammi spoke up.

“Dr. Rabinovich?”

Marta looked at her. “What happened to Marta, Sammi? Or should I call you Ms. Fleming?”

Sammi looked down. “Are you really a quantum physicist?”

Marta smiled, “Yes, Sammi, I really am.”

“And are you one of the smartest people in the world, as Wikipedia says?”

“Well…”

James interrupted. “Sammi, yes, she is. That’s one of the many reasons I love her. I’m hoping that one of these days, she’s going to let me in on some of her quantum secrets.”

Sammi sat fidgeting with her fingers. “I didn’t know who you were. I’m sorry.”

Marta looked at the young woman, and said. “Does it matter, Sammi? I mean, should I be sorry that you’re so much taller than me? I think people should be judged on how they behave. Don’t you?”

Sammi opened her mouth to speak, but Janet interrupted. “Unfortunately, Sammi has had a lot of grief because of her height. There are people who think that there’s something wrong with a girl who’s 6’ 2”, that she’s a freak.”

Sammi looked up, “Mom, that’s one of the reasons I like James so much. He never gave me the slightest inkling that my height mattered to him. He seems to like me for me. He acted like I was a sexy girl, not a freak.”

“Sexy woman, Sammi,” James corrected.

Janet sighed deeply, “You know, it’s kind of hard for a mother to hear things like this.”

James looked at her, and said, “Yes, I imagine you’re right. I have a great deal of admiration for you for treating your daughter as a grown woman.”

Janet stifled the urge to ask if that was so he could keep fucking her, but said, instead, “And do you know who James is, dear?”

James frowned, “Is this necessary, Janet?”

Janet looked hard at him, “I think it is.”

James sighed, then shrugged. “Go ahead.”

Sammi looked at them both. “What’s going on? What are you not telling me? Mom?”

“James Llewellyn Gainsborough is a tech entrepreneur, and one of the richest men in the world.”

Sammi looked shocked, put her hand to her mouth, and stood there.

James waited.

“Why didn’t you tell me?”

“Would it have made a difference? I mean, can you see my money when I’m naked? Would it matter to you when I’m inside you? Does it make me a better person, or a worse one? Who am I, Sammi? One of the richest men in the world, or your friend? And why can’t I be both?”

“He also has a reputation for banging supermodels and movie stars.” Sammi’s mother said.

Marta stood up and said, “Mrs. Fleming, you have worn out your welcome. Please leave.”

Janet stood up to go.

Sammi stood up and grabbed Janet by the arm. “No! Mom you will apologize. These are my friends, and you have no right to insult them, especially after they gave you the benefit of the doubt.”

Janet looked at her daughter. “I’m trying to protect you.”

“Well, fuck that noise, Mom! If you insult my friends, then you insult me. And don’t expect me home until you apologize.” She stood up tall and looked down at her mother. “Now, leave!”

Janet looked up at her daughter, glared at James and Marta, then quickly left.

~~~~~

“I’m so sorry…”

James cut her off. “No need, Sammi. You’re responsible for your behavior, not someone else’s, even if she is your mother. Marta, do you think Sammi should go home and try to patch things up with her mother?”

Sammi interjected, “No! Not gonna happen. She was wrong…”

“She’s trying to protect you, Sammi, and I can’t fault her for that. For all she knows…well, for all you know, we might be trying to exploit you for some nefarious purpose. What that might be, I can’t imagine, but it’s possible. But as I said before, it’s your life. You make your own decisions.

Sammi nodded, then looked at him. “James, you said I wasn’t going to be allowed to play with you guys for a week because I came without permission in the movie theatre. What am I doing here?”

James smiled, “Marta happened, that’s what. I asked her to tell me if she had any fantasies, and she told me she wanted to do you what I do to her. And she told me she couldn’t wait, so she asked me if there was some other form of punishment we could meet out.”

Sammi sat up straight. “And is there?”

James smiled. “That depends on what you’re willing to endure. I think I can pack a week’s worth of edging into an hour. Are you game?”

“Absolutely! When do we start?”

“Why don’t we have something to eat first?”

Sammi slumped down, “You know, most of the time I can’t wait to eat, but now I just want to get through it!”

~~~~~

Sammi was seated on a straight-backed chair with her wrists bound to the chair back. Her feet were secured to the outside of the chair legs, keeping her knees wide apart.

Sammi was wearing a leather collar, cuffs on her wrists and ankles, plus a thong that held a vibrator in place. The vibrator had a slim electric cord running out of the side of the thong, and down in front of her between her legs, then off to a machine to one side. Instead of the usual silicone, it was made of a hydrogel. Her body heat was causing it to mold itself to the contours of her vagina, and it curved inside and covered her G-spot.

“This is a prototype, Sammi, but the amount of current is so small that you wouldn’t feel it even if something went wrong, so don’t worry about that.” He smiled, “You’re going to have other things to worry about.

“Now, you’re going to watch Marta and I as we have sex, but you’re not allowed to cum. That’s going to be your punishment.”

“I…I’m not sure I can manage that…Sir. I tried not to cum at the movie theatre, but it just overwhelmed me.”

“I know, and that’s why I have you wired up now.

“I don’t know if you recall what I did with Marta at the movie theatre, but I had her wired up like a Christmas tree, she just wasn’t aware of it initially. Your collar, cuffs, and the vibrator are gathering data about how excited you are, and the data is being fed to the Artificial Intelligence app I created for Marta. Let’s see how well it does working on you. As for the rest, well…you’ll find out!”

Then Sir stepped forward and fitted a ball gag in Sammi’s mouth, which she found strangely exciting all on its own. “That’s just to make sure you don’t interrupt us as we get…involved. Have fun, Little Girl!” He smiled and kissed the top of her head.

The chair was situated next to Marta’s bed, and Marta was sitting there, naked, knees up and open, and eager to get started. James climbed onto the bed, Marta turned towards him, and they started making out, just slow kissing to start. His hand trailed down between her legs, stroking her mound and labia gently.

Sammi’s vibrator began buzzing, both inside, massaging her G-spot, and outside, working her clit. Sammi was caught by surprise and jumped, then settled down.

Meanwhile, the vibrator’s ministrations seemed to shift location slightly over time, until they were precisely targeting her G-spot and her clit. Her excitement stepped up measurably after that. Sammi could feel her orgasm rising, and fought against it, but she knew this was a battle she was going to lose.

Yet, just as it seemed her climax was inevitable, the vibrations stopped. Her breath whooshed out of her, and she collapsed forward. She was still excited, and was sure that as soon as the vibrations started again, she would be pushed over the edge, no matter what.

Then she noticed a strange sensation; it almost felt as if the vibrator was getting cool, even though it wasn’t vibrating. A few seconds later she was sure of it. The vibrator was getting cold, so that her body was losing the peak excitement she had been feeling. She shivered, not just a little bit, but a whole-body shiver. It wasn’t so much the sensation itself that caused this, but the idea that her body was being controlled by Sir and an AI app. They weren’t going to allow her to cum, no matter how much she wanted or needed to!

She took a deep breath around the ball gag, found she was starting to drool, and that it was starting to drip onto her naked tits. She also knew she was more excited about her current scene than anything she had ever done with her friends, and, cold vibrator or not, her cunt was soaking wet!

She looked over at James – or rather Sir – and Marta, and found they had changed position. Marta had rolled over into doggie position. Her head was down, she was smiling and facing Sammi. Her shoulders were down flat on the bed, her thighs were almost perfectly vertical, her legs were spread wide, and her feet splayed slightly out to the sides, offering her vulnerable cunt to her Master.

Sir was kneeling behind her, but not touching her. Instead, he gave her ass a stinging slap, then waited. Marta moaned, then said, “Please, Sir, your filthy whore wants to be fucked. Please shove your cock in my wet hole. I’m such a dirty cunt, such a needy slut that I’m begging you to please fuck me, fuck me hard!”

Sir shuffled his knees forward and started rubbing the tip of his cock up and down along the opening to Marta’s cunt, but did not push into her. Marta moaned, and Sammi echoed her. She had never been able to watch anything like this, and it was an immense turn-on.

At that moment, her vibrator started up again, and began to warm at the same time. She moaned more deeply in her throat, and drool started to dribble out of one corner of her mouth, dripping, drop by drop, onto her tits and left thigh. She tilted her head back, swallowed as much of the saliva filling her mouth as she could, then turned back to watch Sir use Marta’s body as his fucktoy.

He pushed his cock part way into Marta’s cunt, and she moaned loudly. He stopped, then withdrew completely and waited. “Ohhhh…please, Sir, please! I need you to fill me with your cock. Please, I’ll do anything you want, anything at all, please!”

“You’re going to lick and suck my cock clean after I’m finished fucking you, aren’t you slut.”

“Yes! I promise! I love sucking your cock, it belongs in my mouth! My mouth is your cock’s home, where I want it to live. Please, Sir, fuck me now, please!”

Finally, Sir shoved his body forward, ramming his cock completely home into her. Her body was forced forward, then she pushed back, trying to get him deeper inside her. She yelped, her hands clutched the bedclothes, and her eyes seemed to turn up in her head as Sammi watched.

Meanwhile, the vibrator was working its magic on Sammi, and seemed to know precisely how to turn the volume of her excitement up to eleven. Her body responded more quickly than she could ever remember, and she knew she was going to start to climax any second…

Until the vibration stopped dead and the vibrator started getting cold again.

Sammi groaned loudly, pulling at her bonds, and throwing her head back to scream into the ball gag in frustration!

Sir stopped in mid-fuck, his cock part way out of Marta, causing Marta to moan in frustration as well. He turned to Sammi, and said, “Having fun, Little Girl?” And he smirked. Then he slowly re-inserted himself deep into Marta’s body, only this time he stopped, pushing himself completely inside her. After a moment, Marta tried to wiggle her bum, “Please, Sir, more! Please!”

Sir smacked her ass hard. “Shut up, cunt. You’ll get what I want, when I want to give it to you. Understand?”

Marta’s grip on the bedclothes tightened, she squinched her eyes shut, then nodded and kept quiet.

Sir turned back to Sammi. “So, how’s the app working, Little Girl? Are you enjoying it?”

Sammi shook her head no, then stopped, then nodded, then stopped again. Her eyes showed her confused state.

“Good. That’s what I like to see. Would you like my cock inside you?”

She nodded vigorously, and tried to say “Pah-rease!” around the ball gag.

“And do you want it straight, or kinky?

Sammi thought for a second, then tried to speak around the ball gag again, “Khin-ka” was the sound that came out.

 “I’ll take that as kinky. And I have a really nasty kink thought up for you. Pain and pleasure in equal measure. Does that sound good to you?”

Sammi’s eyes widened, and she nodded enthusiastically.

Sir nodded. “Oh, you’ll get it – just not yet.” He smiled wickedly, glanced at the bedside clock. “Only another twenty-seven minutes before I might release you – so, have a ball until then, okay?” Sammi groaned.

And he started slowly fucking Marta again, pulling out slowly, then slamming himself in hard and fast, all the way, causing her body to tremble each time he struck home. Marta gasped the first time he pounded into her, then grunted each time he rammed forward.

Sammi’s vibrator started up, and the cycle began again. The vibrator seemed to be alive and know precisely how to turn her on, how fast to vibrate her clit, how hard to stimulate her G-spot, and precisely where in order to accelerate her excitement, pulling her fast towards the peak of a climax, then jerking it back again with cold inside and outside of her, dampening her ardor. And the cycles were getting shorter, faster, and more violent.

Sammi started moaning almost continuously, her body started to vibrate, her hips writhing continuously, until finally, she started sobbing in frustration.

Sir noticed that she was starting to sniff. He withdrew completely from Marta’s cunt, and moved off the bed. Marta screamed in frustration, pulling on the bedclothes, but afraid to move in case Sir should choose not to re-enter her.

He stepped off the bed, moved behind Sammi, and said, “I’m going to take the ball gag out of your mouth, but you have to promise not to speak unless I allow it, okay?”

Sammi, who was so frustrated that she almost didn’t care, nodded.

Sir quickly undid the fastenings of the ball gag, then let it fall from Sammi’s mouth, holding it by one end of the strap, then putting it down. Sammi licked around her mouth, catching some of the drool falling from it, then dropped her head towards her shoulder to wipe her mouth as best she could.

Sir picked up a cloth and wiped her mouth, then stooped and kissed her. She moaned into his mouth, and pushed her tongue deep, seeking his tongue. He toyed with her tongue for a few seconds, then withdrew, patted her on her head, and walked to the front of the bed. Sammi threw back her head and screamed in frustration, but had the presence of mind not to speak.

Sir bent down to look Marta in the face. “I think my cock needs more lubrication, don’t you?”

Marta looked up at him, and, not knowing what else to do, nodded.

“So, suck it, slut,” and he offered his slick member to her waiting mouth. She stretched her neck and scooched her shoulders over, and he put one knee up on the bed, then pulled her mouth onto his cock, pushing it as deeply into her throat as the angle would allow. She made slurping noises as she eagerly tried to pour her saliva over his cock, desperate to have it in her cunt again.

Finally, after letting her slobber over him, he pulled out, walked over to the bedside table, and picked up a slim, silver object, about eight inches in length. Then he climbed back onto the bed, positioning himself behind her.

He put the silver rod into his mouth, moistening it, rubbing it back and forth along his lips. Then he slowly inserted into Marta’s vagina.

She squealed, and he smacked her ass. “Shut up, slut. You’ll get what I want to give you, understand?”

She turned her face into the bed, screamed, then nodded.

He pulled the silver rod out of her cunt, flicked a switch so that it started buzzing, then positioned it at her puckered asshole. She tensed. He smacked her ass again, and waited. She breathed heavily, then consciously relaxed her ass.

When he saw that the tension was slowly leaving her puckered star, he slowly, gently, worked the vibrator into her ass until it was almost all the way inside her, with just a small end sticking out. Marta groaned, and her hips started writhing.

Next, he positioned himself with his cock at the entrance to her pussy. He slowly slid his cock back inside her, pulling her hips back towards him until he was balls deep inside her. Once he was as deep as he could get, he wriggled his cock back and forth, rubbing up against her cervix. She moaned more loudly, and her hips continued to move, now shimmying quickly against him. She knew she was going to cum soon, and hoped he would as well.

Meanwhile, Sammi’s cycles continued, her whole body was now tingling, and it seemed as if she would finally, inevitably cum, no matter what. Then the vibrations stopped completely, and the vibrator cooled off again, then got cold. She turned her head up and screamed loudly in frustration, balling her fists.

Finally, Sir began fucking Marta in earnest, pistoning in and out, slowly at first, then faster and faster. He reached down between her legs and started massaging her clit. Marta’s whole body suddenly started shaking, she turned her head to the side, and started crying as she came.

This triggered James, who started moaning in a voice from deep within his body, timed to coincide with his thrusts deep into Marta’s body. His body went rigid as well, and he turned his head up and gave a long, sustained groan, then collapsed forward onto Marta, crushing her.

Her hips continued to wriggle, but she fought to keep from collapsing, tensing her leg muscles to hold her position, panting hard.

Sammi watched in frustration, unable to cum herself, unable to touch herself, locked into her torturous position, able only to be a helpless witness to Marta and Sir’s violent orgasms. Finally, Sir rolled them over onto their sides, and they made spoons together, while Sammi watched, helpless.

After a time, while Sammi’s AI demon had run her through two more frustrating, complete up-down cycles, Sir, lifted his head, glanced at the clock, then slowly withdrew from Marta. She reached up, stroked his arm, and kissed his hand affectionately.

He walked into the bathroom, coming out seconds later, wiping his cock with a cloth, then handed another to Marta, who wiped it between her legs, then left it there.

Sir walked over to Sammi, then picked up the smartphone on the table next to the bed, tapped a few of the buttons, then said, “Application Smartcum, stop program before climax.”

The vibrator inside Sammi’s thong picked up speed, and Sammi felt herself getting close once more – and once more the vibrations stopped at just the wrong time.

“You penance time is up, Sammi. Do you want me to continue running the app, or would you like to move on to the kink we have planned for you?”

By now, Sammi was exhausted and panting. Her body was tingling, but tense as she had been massively, intelligently, decisively edged for the past hour. She was desperate to cum.

She looked up at James and said, “Please, no more edging. I think I’ll go fuckin’ crazy if you keep it up. Please!”

James smirked at her, then started to undo her bonds. When he had finished, Sammi slumped forward onto her hands and knees on the floor, breathing hard.

James helped her up onto the bed. She flopped over onto her back, head on Marta’s shoulder, breathing hard. Marta stroked her hair and kissed her forehead. Sammi pulled her legs up to her chest, hugging herself, trying desperately not to touch herself.

“Oh, my God. That was SO intense! It was a like I was possessed by a sex demon intent on torturing me!”

“Good, because that’s precisely what I was aiming for.

“But if you thought that was intense, wait until you see what we have planned for you next!”

Sammi lifted her head from Marta’s shoulder, licked her lips, and said, “If you'll allow me to cum, I want to start right now! I’m desperate!”