Mark and the Machine

by: Kentauros | Complete Story | Last updated Aug 7, 2025


Mark can't get over his parents divorce, so he invents a machine to take them back to when they were together.


Chapter 1

Part 1

Elizabeth hated the way her son, Mark, had withdrawn after the divorce. He had always been a bit introverted, but after the ink was dry on the divorce papers there was a change.

Mark now spent all of his time inside of his room, tinkering with all of his little gadgets. He stopped hanging out with his friends, he stopped attending extracurriculars and all her attempts to check in on him or offers to watch movies or TV shows were rebuffed. It was like her house was being haunted - food disappeared, chairs and knick knacks would change position but she hardly ever saw her son, even though she had primary custody. When the weekend rolled around, and his dad came to pick him up, she hardly noticed the difference of having an empty house.

Elizabeth hated that things had turned out this way. She had tried to tell Mark that the divorce wasn't his fault - that it was better for mom and dad to be apart, but even though he had grunted acknowledgement that she had spoken, she didn't know if he really believed that in his heart of hearts. He had just mumbled about how he wished he could fix things, make them back to the way they were.

She was also quite disappointed to see him break up with his girlfriend Wendy. She had been such a nice girl, and even though Elizabeth knew high school romances never lasted, she was sad that the divorce led to two relationships breaking up.

This was not what she had envisioned when she married her husband. They had met at the university where both of them attended, got married right after college and were expecting their first child within a year. Before that, Elizabeth had had a bit of a wild phase, partying and enjoying her college experience to the maximum degree, but she had slowed down by the time she married John and had settled into a domestic life. The two of them had gotten jobs, and had made good strides in their career as they raised their son together. She felt lucky to have her husband, and Mark, in her life.

Unfortunately, all that changed when John cheated on her. Not only did he cheat, but he left Elizabeth for another woman.
Elizabeth didn't know what she had done wrong, but the hurt had been too much for her to deal with. After a few weeks without John, she started seeing a therapist who helped her process through the pain and anger over losing her husband.

The next year and a half had been rough, filled with nights drinking wine while watching old rom-coms and eating ice cream until she fell asleep. She did try to go out with her friends, and she had tried online dating, but without much success. Everything seemed hopeless.

Then one day, she received a call from Mark's school saying that he had failed one of his classes. That's when she realized something had to change. She decided to confront her son, but she was surprised at how he responded.

"You've got to take school seriously, Mark! I know the divorce has been hard, but you're going to be applying for colleges soon and they're not going to like an F on your transcript."

"It doesn't matter," he said, circles under his eyes from lack of sleep and a strange giddiness about him. "I figured it all out. I've made something that will fix everything."

She had no idea what he was talking about.

"What do you mean?" she asked, trying to stay calm. "Are you thinking of dropping out? Are you planning to drop out of school altogether?"

"No," he said, smiling. "Don't worry, mom! I'm sorry about failing history - sacrifices had to be made while I worked on my little project. But it's done now, and it won't happen again. You'll see."

She wasn't sure what he meant, but she trusted him. He had been so responsible all of his life, and she knew he wouldn't let her down. If anything, she thought maybe he had found some sort of magic wand and it was going to turn everything around. If only she knew...

Elizabeth was surprised when Mark actually ate dinner with her the next night. He seemed in high spirits, and she felt like there was a hope behind his eyes that she hadn't seen in years. She didn't know why the sudden change had come over him, but she was happy about it. Maybe it had taken him a year or two to deal with the fall out. Her son was maturing, and even with the disappointment of his recent low grades, she was reassured that she had done the right thing in trusting him to not make the same mistake.

After dinner, they watched a movie together. As the credits started to roll, Elizabeth saw something odd: all of the furniture in the living room had moved in a circle around the television stand. It looked like someone had been spinning it.

"Uh, did you redecorate, Mark?" Elizabeth asked.

"Yeah, sorry about not asking you first," he said cheerily. "I just thought the way we used to have the furniture was better, and so I took the liberty of moving everything back."

Elizabeth wasn't angry, but she did find this behavior a little strange. One of the things she had done shortly after the divorce was reorganize the house to better fit her liking. The old one had reminded her too much of John and his many little particularities. However, with a year and a half of distance, she didn't feel much one way or the other about the "new" old layout. She did wonder if she had misjudged just how much progress Mark had seemed to be making.

However, Mark continued to be cheerful throughout the week, eat dinner with her, and watch movies, and she wasn't about to complain about this after such a long time of radio silence. If the cost of having her bright young boy back was a slightly suboptimal furniture layout, maybe she was willing to pay it. Besides, she would get used to it eventually.

She had to admit, though, that the new arrangement really did look nice. In fact, Elizabeth was almost embarrassed at how little effort she had put into rearranging the room.
Then time came for the hand-off of Mark back to his dad, John. Elizabeth wondered how Mark's new attitude would manifest with his dad.

"Hi dad!" Mark said brightly, then he turned to his dad's girlfriend. "Hi Jennifer."

Elizabeth still didn't like having that floozy around the house, the homewrecker who had broken up their relationship, but she tolerated it because it was only for a few minutes at a time anyways.

"Jennifer, can I talk with you about something in private?" Mark asked.

Jennifer rolled her eyes, but nodded, following Mark into another room. After a while, Mark came back alone.

Mark's dad clearly thought it was strange that Jennifer hadn't come back, but didn't say anything. Elizabeth thought she heard a sound like an infant crying for just a second, but it soon subsided and so she concluded she must have imagined it.

"What's that you got there?" John asked his. "Another one of your inventions, son?"

Mark smiled. "Oh this? Well, it took me a long time to finish it, but it's actually going to fix your and mom's marriage!"

"Mark, we've talked about this, you know-"

But Elizabeth's words were cut off. Mark had pointed the device at her, and had pressed a button on the device. A display on the device said 38 then over the next few moments it seemed to change 37, 36, 35. It stopped there.

Elizabeth blinked in confusion for a few seconds. She felt disoriented - sure, she was in her house, but something had completely derailed her train of thought.

Then Mark pointed the device at his dad, and a very similar process played out. 38, 37, 36, 35.

"Is everything alright?" Mark asked, his confused parents.

They nodded exchanging glances. Neither of them knew exactly what had just happened, but they both had a strange sense of deja vu.

"Mark," Elizabeth said. "It's so strange, you seem... older."

Mark smiled. He pointed the remote at his mom, and clicked another button. Suddenly, she didn't know what she had found so strange. Of course her son looks this old. He did the same to his dad, and then left the room.

Mark came back holding a baby, in a bundle of women's clothes.

"Hey, guys," Mark said. "I just finished up a babysitting job, so I'm going to drop this little one off with her parents, is that alright?"

They exchanged another glance, and Mark left their presence.

"I'm not the only one who found all of that a bit strange, am I, honey?" John said.

"No, that boy was definitely up to something," Elizabeth agreed.

"Well, now that he's alone, want to have a little fun?" John said, pulling her into an embrace.

"John," she giggled. "You're so bad! What if he comes back for something?"

"That would be terrible, wouldn't it," John said playfully, kissing her on the neck.

Elizabeth looked around, as if to make sure they were truly alone. "Alright, you win, but let's make it quick, I've got to get groceries."

* * *
Mark could hardly believe that his age-changing device had worked! Sure, he had spent the last year and a half developing it, but he had spied on his parents a bit after leaving. They clearly were back in the head space they had been in when they were both 35. And the awareness function had kept them from noticing anything weird about the year mismatch!

The baby in his hands, formerly the homewrecker Jennifer, started crying.

Mark had half a mind to drop her off at a fire station, and let her get adopted by a nice family. But he did feel a little guilty about doing that, even if Jennifer had been the cause of his parents divorce. He decided to do something else instead. With a little bit of googling, he tracked down Jennifer's parents, and after a ring of the doorbell, and a few pushes of a button they were happily re-raising their infant daughter, unaware of the years that had just been erased from all of their lives.

Mark hoped they'd raise her better this time.

He decided to go on a bit of a drive through the city, not really intending to go anywhere at all. After all, he had heard his parents' conversation, and he wanted to give the two lovebirds a little bit of alone time. Mark smiled. It had worked! Everything was back to normal again.

He didn't really have a destination in mind, but he realized partway through the drive that he was in the neighborhood of his ex-girlfriend Wendy. He felt a twinge of regret at how things had ended between them. She had been so kind and compassionate after his parents' divorce, but he had pulled away from her, and eventually his continued emotional unavailability left her no choice but to break up with him.

Wendy hadn't had trouble rebounding after that. She was an attractive young girl, probably one of the hotter girls in the school, so it was no surprise that she had a new boyfriend a mere week after their break up. She had had a few boyfriends in the last year and a half, but none lasted very long, and word on the street recently was that she had become a bit of a school bicycle.

Mark didn't care about any of that. He just knew that Wendy and him had once been together, and he realized that he had the means for the two of them to go back to that time together.

He drove the familiar route to her house, and was soon knocking on her door.

No answer.

Maybe she wasn't home?

But after a few more rings, Mark heard the lock turn and the door swung open.

"Oh, Mark," Wendy said, a bit surprised. "I wasn't expecting you. I thought-" She scanned behind him. "I was waiting for someone else."

"Is it alright if I come in?" Mark asked.

Wendy frowned, but she nodded.

"Make this quick though, Mark," she said. "What's up?"

Mark looked nervous to her. She feared the words that were going to come out of his mouth.

"I-I just wanted to apologize for how things turned out all those years ago. My time with you, it was one of the happiest time of my lives," Mark said.

Wendy sighed. "I enjoyed our time together as well, Mark, but... that's all in the past. I've moved on and you should to."

Mark looked a little hurt. "Moving on was easy for you, wasn't it?"

"It wasn't hard at all, Mark," Wendy said. "You simply weren't there anymore."

Mark took a step closer to her, and leaned in towards her face. His eyes were filled with longing.

"I'm here now, does that mean anything to you?"

Wendy's eyes widened, and she looked toward the door, as if sure someone was going to come bursting in any second.

"Mark," she said, a bit of desperation in her voice. "I don't really have time for this. I'm really sorry about how things turned out between us, but I can't see us getting back together like this."

"Please, Wendy," Mark begged. "I know we can fix everything, if only you'd just give me another chance."

"Not possible, Mark," she said firmly, pushing him away. "Too much time has passed. We're different people now."

Mark took a few breaths, then closed his eyes. "I was hoping I wouldn't have to use it."

Wendy felt a tinge of panic. She knew Mark, or at least she thought she did, but she wasn't sure if he had changed for the worst within the last year and a half.

"Mark-"

But her words were cut off by him pressing the "Mental Adjust" button on his remote. The display read "17y4m" and it started counting down - "17y3m", "17y2m"... and all the while Wendy's eyes were glazed over. She looked completely blank.

"16y11m", "16y10m", "16y9m", ..., visions of months of school danced before her mind. Class lectures and gossip surfaced and then disappeared like it never happened. Her many dalliances beneath the bleachers came to the fore, reminding her of her many delicious adventures, before flying into oblivion, leaving her wondering what she had just been thinking.

"16y2m", "16y1m", "16y0m", ..., in her head she had just celebrated her sweet 16. It had been so much fun! Her and her girlfriends had partied, and afterwards her jock boyfriend had treated her to an amazingly steamy night. He wasn't the hottest guy she had been with, but he was definitely the best lay. She began to suspect that she might enjoy the pleasures of a flesh, given the chance to play the field.

"15y11", she had bounced back beautifully from her breakup with Mark. She had liked him quite a bit, but she had been taking things slow with him, and hadn't done more than kiss him. She hadn't made the same mistake with her new boyfriend. Well, that was kind of revisionist history. She hadn't expected to go all the way with Jason on her first date, but after a big cry and a lot of soul searching, she realized that she really did have feeling for Jason, and she wouldn't mind fucking him again. But as these thoughts resurfaced, they faded away like castles on a beach, washed away bit by bit.

"15y10", "15y9m", Wendy smiled. She loved her boyfriend Mark! He was sweet and caring, and little bit nerdy, but he treated her with respect, and they loved each other. They had been together for two years at this point, and he had been so careful to make sure she always felt comfortable. He had even asked her before their first kiss. It hadn't been fireworks, but it had been a pretty nice kiss, and she could see things going somewhere with Mark if things kept going this way.

"Well, Wendy, how are you feeling?" he asked.

"Um," she giggled, seeing Mark there. "I'm feeling pretty good actually. How've you been, babe?" She seemed a lot more innocent and immature compared to how she had carried herself before.

"Well, It's been pretty hard recently, but I think things are finally looking up again."

"I'm so happy that whatever was bothering is getting better," she said happily. She walked forward and hugged Mark.

It felt so nice being in her boyfriend's arms. His wonderful masculine scent, the sense of security and safety in his arms, the feeling of his head resting on hers. She felt her pulse quicken the way it always did when she was this close to Mark. She was starting to feel a familiar warmth, and the shame that always came with it. It was all so familiar.

But... she noticed something was a little off.

"Mark," she said, taking a step back. "Did you, uh, notice anything strange when I hugged you just now?"

Mark shrugged. "Like what?"

"Well, um," she said timidly. "I don't know how to put this, but did my boobs just feel bigger when they pressed into you just now?"

Mark's face went red, and he stepped back, staring at her breasts with wide, frightened eyes. "No!" he mumbled quietly.

"Oh," Wendy said, her smile fading away a bit.

"I mean, yes," he admitted. "I guess they have gotten a bit bigger."

Wendy cupped her breasts. "A bit? These puppies are at least two cup sizes bigger than I remember them being."

Mark smiled. "I like them though, they suit you nicely."

"That's not it," Wendy said, a little embarrassed. "It's more like, uh, do I look older to you?"

Mark gave her a strange look. Like he was deciding what to do. She noticed his eyes dart down to his right hand. There was some kind of TV remote there. It was crazy, absolutely crazy, but she began to wonder if something strange was happening. Something to do with the device in his hands.

"Mark, you also look a bit strange," she admitted. "I didn't notice it at first, because I was so happy to see you, but you look more... mature? Like, your face is a bit different, and it seems like you've gotten taller or something. And," she gulped at the words. "It seems like you're a bit less scrawny than I remember. Like you've worked out or something."

Mark shrugged. "I can't hide anything from you. I've used my new invention on us," he lifted the device and showed it to Wendy.

"No way," she said, "Don't tell me, did you make the two of us older?"

Mark nodded.

"Oh my god, I knew it!" she said excitedly. "Come on, let's go to the bathroom."

She grabbed Mark's hand and dragged him to the bathroom.

"Oh, wow!" she said. "I look so grown up. How much older did you make us?"

"About a year and a half," he said.

"A year and a half?" Wendy said, looking at her breasts again. "If my chest filled out this much in just two years, imagine what I'll look like when I'm even older."

"We don't have to just imagine," Mark said. "I could give you a sneak peak if you want."

Wendy smiled. "Oh, really? I want to see what I'll look like at 25!"

"Coming right up."

He pointed the remote at her, and she felt her clothes start to get tighter. Her bra strap started to dig into her skin, and she could feel her jeans becoming more restricting as her as ballooned up. She undid her bra, and just in time as her breasts bounced into view significantly larger than before. And at the same time, she could feel herself getting a little taller. She had been at eye level with Mark's chest, but as she grew she eventually found herself at eye level with his neck.

When the display finally read 25, Mark couldn't help but gasp. "Wow, you look incredible."

"I feel incredible," Wendy said. "I'm so sexy! I can't believe that this is what I'll look like when I'm all grown up. Although," she shifted a little. "My clothes are pretty constricting right now."
Mark didn't mind that at all. The tantalizingly tight top - practically bursting at the seams, which now showed off her midriff, the jeans which hugged her ass and now showed off her ankles - it was all making it harder and hard for him to control himself around her. She noticed the effect she was having on him and smiled.

"I'm afraid," she said seductively, "that I'm going to have to take this off, and change into some of my mom's clothes."

Mark wanted to watch her undress. He had never seen her naked, let alone as a 25-year old knockout and naked, but then the doorbell rang downstairs.

Wendy frowned, she had wanted to tease Mark a little more with her new body, but someone had to answer the door.

"I can't answer the door like this!" she hissed. "You go get it." But realizing she was breaking the mood, she decided to add, "When you come back up, I'm going to be wearing something nice, just for you!"

Mark's whole body shivered at those words. He walked stiffly downstairs, and answered the door.

It was Lewis from the football team.

"Mark?" he said. "What's a nerd like you doing at Wendy's house? She's not taking you back, is she?"

"As a matter of fact," Mark said. "She is."

"No way," Lewis said. "I want to hear it from her mouth. Let me in."

The taller, stronger football player pushed his way past Mark, and was halfway up the stairs when he tripped on his pant legs.

Why were his clothes suddenly so loose?

He could feel his clothes growing around him, and it was with horror that he realized his clothes weren't growing - he was shrinking!

"Fuck, what's happening?" Lewis said. His voice sounded high pitched - like a little kids! "What are you doing?"

Mark shook his head. "You should have stayed outside Lewis."

Lewis twisted around on the stairs, managing to get his head free. "Please Mark, stop this! Change me back."

"I'll change you back," Mark said. "Just tell me one thing first, when did your relationship start with Wendy?"

Lewis scoffed. "Relationship? We're fuck buddies. We just hook up." The words sounded ridiculous coming out of the mouth of a little kid.

"When did you two start hooking up?" Mark asked.

Lewis trembled. "Three months ago."

Mark nodded, and pointed the remote at Lewis again. He erased three months of memories.

"Woah," Lewis said. "Where am I? What's happening?"

Mark looked at the 4-year old Lewis. Now that his memories of being with Wendy were gone, it was probably safe to turn him all the way back, but Mark didn't want to give Lewis the satisfaction. He clicked up, and the display read 4, 5, 6, 7... before finally stopping at 14. Lewis was positively a pipsqueak compared to how he had come in. Lewis muscles, honed of years of football practice, were shrivelled up and gone. And Mark now towered over him.

Mark smiled down at Lewis, and pressed the "Awareness" button, and then the "Global Awareness" button. Now, Lewis wouldn't notice anything strange about being a 17 year old with the body of a 14 year old, and no one else around him would either.

"Go home, Lewis," Mark said. "I don't even know why you're here."

Lewis didn't know why either. Was this Mark's house? It didn't look familiar.

Lewis held up his strangely roomy pants as he ran out of the house.

Mark smiled, and then went upstairs to see what Wendy had put on. He also had an idea for what to do with Lewis' memories that had been stored in the device...

* * *

Mark was still smiling when he returned to the bedroom.

Wendy was standing in front of the mirror, admiring herself. Her top was a little longer, but the neckline was lower than before, showing off her cleavage, which was now considerable thanks to her older body. Her pants were also a little tighter, and they clung to her ass and thighs.

"That looks good," Mark said.

"Yeah, it does doesn't it?" Wendy replied. "I feel so sexy."

"I'm only sad I didn't get to see you change into it," he said.

Wendy blushed. She may have had the body of a 25 year old, but she still had the mind of a virginal 15-year old, and she didn't know how to react to Mark being so forward.

"Come here," Mark said.

"What?" Wendy said.

"I want to show you something," Mark said. He grabbed her hand, and pulled her towards him.

She followed obediently, and he led her to the bed.

"Lie down," Mark commanded. "On your back."

Wendy obeyed, lying on her back.

Mark got on top of her, and kissed her passionately. She responded by kissing him back just as passionately, their tongues dancing together.

"God, you taste so good," she moaned.

"So do you," Mark replied. He reached down, and grabbed her breast through her shirt, squeezing it.

Wendy gasped, surprised at how much he knew about her body, and then pushed him away.

"Wait!" she exclaimed. "Stop. This isn't right."

"I don't think it's wrong," Mark said. "I love you, and I've loved you for ages."

"I'm not ready Mark," she said.

"But you will be," he insisted. "We can take our time, I don't care if we wait another month or two, or even five."

"I know, but..."

"It's okay," Mark said. "You don't have to say anything, just let me make you feel good. I won't go further than you're comfortable, just stop me if I go too far."

Wendy lay back on the bed. Mark pushed her shirt up, exposing her breasts to his gaze once more. Once more? Mark smiled slightly, realizing that Lewis' had blended perfectly with his own. Mark was now far from a virgin, even if he only had 3 months of Lewis' sexual experiences as memories. He had seen Wendy naked several time before, but never like this. Never as a 25 year old virgin. Her nipples were hard, and her large pink areolas stood proud from her perky tits. Mark slid his hands under them, caressing and rubbing her soft skin. She gasped, and arched her back.

"Do you like that Wendy?" Mark asked.

"Mmmm... yes," Wendy replied. "Keep doing it."

"Good girl," Mark said, and he continued to massage her breasts, squeezing and fondling them.

"Oh my God," Wendy said. "Yes! That feels amazing!"

"How does it feel?" Mark asked. "Tell me."

"It feels really good," Wendy said. "Your fingers feel so good against my boobs. And your tongue tastes so sweet."

"Thank you," Mark said.

He brought his face closer to her chest, and he sucked at one of her nipples. She moaned, and pushed her chest into his mouth.

"Ahhh... Yes!" she cried. "More! More please! Suck my tit harder!"

Mark obliged, sucking on her nipple until it was rock hard and sticking straight out. Lewis memories felt like having cheat codes. He knew exactly how to please Wendy.

However, she slowed him down when he started taking off his pants.

"Stop," she said. "This has been incredible, but... I don't think I'm ready."

Mark was disappointed, but this time, he managed to rule the desire gnawing within him, and stop himself.

The two of them lay there panting.

"Mark," Wendy said quietly. "When we started dating... I always thought you were a virgin."

Mark tried to keep a neutral expression. He *had* been a virgin, until he had uploaded Lewis' experiences with her just moments ago.

"And I'm not disappointed," Wendy said. "But... I think it's obvious, that this isn't your first time."

Mark started to feel regret bubbling up in his chest.

"But... I liked it," she said. "I think... I think tonight I want to go all the way tonight. My body is crying out for you. But, like, I want to to do it on equal terms."

"What do you mean?" he asked.

She picked up the device, and pointed it at him. There were lots of different buttons, and she didn't exactly know the right one, but she picked one that seemed promising and pressed it. The display went from 17 to 16 to 15. Mark felt his clothes start to get looser, and felt a strange fog come over his mind. Mark's body and mind returned to where they had been when he was 15. His parents were together, never having been divorced, Wendy was his girlfriend, everything was right with the world.

He blinked and looked around Wendy's room. The two of them had studied her many a time, but he managed to catch her slipping her clothes swifly back on, and looking at him.

"There," she said. "I'm sure you're a virgin now. Although," she giggled. "You're so little compared to before. It really is incredible what two years of puberty does to someone."

Mark blinked at the woman, who he was realizing couldn't possibly be Wendy. She was old enough to be her sister!

"A-Are you related to Wendy?" he said, tongue tied.

"I am Wendy silly, but don't worry about all of that. You're exactly as I remember you, although," she stood up, and compared her height with her boyfriend. "I think I'm a little taller than you now!"

Mark didn't know what was happening, but he felt so nervous having a hot 25 year old woman dressing in tight clothing so close to him.

"Wow, I really did a number on you, huh?" she said. "You were so commanding before, but now you're just a timid little virgin."

"H-hey," he said. "You're a virgin too, aren't you?"

She looked demurely at him, and blushed. "I am, but I've decided I want to fix that. I'm all yours."

She sat back on the bed.

Mark looked down at Wendy. She was so sexy! His heart was beating, and he was getting so nervous that he was sure beads of sweat would start forming on his brow any moment now.

"Do you wanna touch my breasts?" she asked teasingly.

Mark gulped and nodded. He very much wanted to do that - the most he had done was kiss Wendy up until now.

"Well, they're all yours!"

Mark stared at her amazing cleavage. She may have been fully dressed, but she was probably just about the sexiest woman he had ever seen up until that point - better than porn. He wondered what must lay under her tight shirt. Her breasts were so much bigger than they had been on 15-year old Wendy. He didn't know exactly how bra sizing worked, but he had assumed she was a modest A or B cup.

"Y-you're sure this okay?" he asked timidly.

Wendy smiled, and took his hand. She guided it to her breast.

His fingers curled around her breast, and he gave it an experimental squeeze.

Wendy let out a soft moan. "Oh, they're just so sensitive now. I love these huge tit that device gave me."

Mark knew he must be dreaming, but it was such a pleasant dream he decided to see where it went. He etched the memory of her breasts into his mind. Every time he timidly squished them, Wendy squirmed and it was doing things to Mark that he didn't know how to handle.

"You can put your hand under my top if you want," she said.

Mark took his hand away in surprise. Was this okay? But he extended his arm, shaking the whole time, his legs like jelly and he slowly slipped it under her top.

Then he grabbed her breast again.

Her bare breast!

This was the most amazing moment in his life. He was so horny now that it was starting to overpower his nervousness. He leaned forward and slowly kissed her.

She kissed him back, and soon the two of them were making out in a sloppy, inexperienced way. It was incredible, and he could tell that Wendy was enjoying it too.

The two of them broke apart after a while, and Wendy turned to her closet.

"Let's find some sexy lingerie, shall we?"

Mark's breathing almost stopped at those words. She walked into her closet, and closed the door behind her.

He heard her fiddling around for a bit, and then she emerged.

Mark got weak in the knees. She was wearing a black lacy bra that could be seen through her sheer white top.

"I'm lucky my mom's about the same size as I am now," she giggled. "So I can borrow her bras and panties sometimes. They feel so nice against my skin."

Mark stood paralyzed, not quite sure what to do next.

"You've got to take the lead," Wendy said. "Come on big boy, I know you've got it in you."

She led him over to her bed, and sat down next to him.

"First things first," she said. "I need to get rid of this clothing I'm wearing."

He looked at her, and saw that she was already unbuttoning her shirt.

"No," he almost shouted. He was surprised by the force of his voice. "L-, uh, let me do it!"

She smiled seductively at him and removed his hands. Still shaking, he advanced, and started unbuttoning her shirt one by one.

Eventually, her lacy black bra bounced into view, and he quickly pulled it off. Her large breasts jiggled as they fell free, and he gasped, unable to take his eyes off of them.

"Don't stare at my boobs, silly," she said playfully. "These big naturals are totally mine now, and I'm going to control them. Don't look at my boobs unless I say it's okay."

He nodded, trying to regain his composure. He had never seen a pair of tits so large before. He had never seen a pair of tits in person at all!

"Okay, now it's your turn," she said.

Mark swallowed hard. He moved closer to her, and placed his hands on her breasts, trying not to look at them as she commanded.

They were even more sensitive than he had imagined. She was moaning softly, and he felt her nipples poking his bare skin. He began massaging her breasts, still not quite looking at them, even as they occupied more and more of his mind and attention. He felt like the blind men feeling the elephant - and like the metaphor they stood for, he felt like he was suddenly experiencing a part of reality, more real than anything he had experienced before.

Wendy moaned louder, and he suddenly realized what she was doing. He looked at her in shock, and she nodded.

"What are you-" he stuttered.

"I'm getting myself ready. You're helping me get ready," she said. "Do you know how I'm doing it?"

"Uh, no..." he replied nervously. He suspected he knew the answer, but per her command he couldn't look at her breasts, and the activity he could feel was further south than that.

"I'm rubbing my clit with my fingers right now," she said. "You can do it too."

He hesitated, and she spoke again.

"Now, I'm not going to tell you again, unless I ask you. Do you want to help me get ready to fuck you, or do you want to fuck yourself?"

He thought about it, then decided that he did want to help her. It wasn't a hard choice.

"I'll do it," he said.

"Good," she said. "And don't forget to keep your eyes shut, or I might just throw a pillow at you."

Now she was just being unfair! Not looking at her amazing, luscious tits was one thing, but not being able to look at her at all!? But he didn't want this to stop, so he nodded, and started rubbed her pussy. Her moaning told him that he was doing a good job, however clumsy his inexperienced ministrations might be.

After a few minutes, Wendy let him go, and sat up.

"Okay, time for the next step," she said.

Mark was confused, but then Wendy kissed him on the neck, and whispered in his ears. "You can open your eyes now, and feel free to look wherever you want."

He opened his eyes, and his mouth dropped open. Wendy was laying beneath him, completely nude. Her large breasts rose and fell with her labored breaths, and her vulva glistened with her juices. His cock twitched as he gazed upon her beauty.

"Wow," he breathed.

It was the best sight he had ever seen. He etched her curves, her sounds, her every movement into his memory.

"Do it!" she said. "I'm tired of waiting."

His cock had been begging for attention this whole time, and he obeyed. He positioned himself between her legs, and pushed forward until the tip of his penis bumped against her clit.

"Oh god yes!" she moaned.

He felt an explosion of pleasure course through his body as he penetrated her, and started thrusting. There was no technique, but all the same he soon felt himself getting into a clumsy rhythm.

"That feels so fucking good," she sighed. "You're really good at that."

"Thanks," he said shyly.

As he continued to thrust, Wendy's moans got louder, and faster. The intensity of her orgasmic pleasure made him start to cum, and he could tell that she was close as well. As he came, she screamed out, and her legs quivered, and he felt her muscles clench around his cock as she let out a moan for the ages.

Finally he finished, and collapsed onto her. She lay on top of him, their bodies sweaty, and he held her.
* * *
After laying in bed, just enjoying the afterglow - Mark playing with her hair, and Wendy drawing using her nails to gently trace his skin, they finished. Wendy pointed the device at him, and soon he was back to his 17 year old self, with all of his memories. He was glad the two of them had gotten to lose their virginity to one another. It was probably the hottest thing to ever happen to him, and he could again remember the casual fucking that Lewis and her had enjoyed together.

"That was amazing," Wendy said. "But you've got to put everything back to normal now."

Mark looked at her 25-year old body. He would hate to see it go! But he decided on a better course of action. He pointed the device at Wendy and clicked Aware followed by Global Aware. Now, he would get to keep his girlfriends hot 25-year old body, and neither she nor the rest of the world would be any the wiser.

He went home, and his post-sex elation was spoiled a bit when he heard his parents arguing through the door.

 


 

End Chapter 1

Mark and the Machine

by: Kentauros | Complete Story | Last updated Aug 7, 2025

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