Cosplay Mom
A Mom goes full Nerd
Chapter 1
by
BadgerAttack
“Happy Birthday!” I yelled at my son as he woke up, startled, in his boxers with the sheets halfway on the ground. His room was a mess; he’d fallen asleep with one of his weird animes on, a collection of scantily clad women at the beach in some competition where the animators found every excuse to make them move as sexily as possible. There were fast-food bags from who-knows-when, the video game console was still on and open to a game on his other television, and his clothes were scattered all over the place. It was impossible to tell what was clean or dirty, but to be honest, that was never one of Aaron’s top priorities; he seemed to dress himself in whatever happened to be within arm’s reach the moment he needed to get outside.
Normally, it really irked me that his room was the only room in the house that wasn’t completely spotless. I’d given up on trying to get him to clean it long ago and told him that if he wasn’t going to, then I wasn’t going to, either. That didn’t phase him, and he had been living in this disaster ever since. However, the reason it didn’t irk me today was because today was different. Today was his 18th birthday, which meant that I could finally legally kick him out of my house without any repercussions.
I know that probably makes me sound like a terrible mom, and you’re probably thinking what I was thinking: “Stacy, how are you going to kick out your only son? Sure, he’s bad, but at least he’s not committing any crimes.” And those are fair points, and exactly the reason why I don’t need him to move out. I’m just going to give him an ultimatum: he has a little anime convention this weekend which he already bought tickets for, so after that convention, he and I will throw away all these trashy anime posters from his room, sell his video game console and both of his televisions, reorganize his room, and donate his entire wardrobe. He will be remade into a nice, handsome young man. Then, after he’s either found a job or applied for a college, he can start buying things again with his own money. I bet that once he experiences a little bit of the good life and possibly his first-ever girlfriend, he won’t be going back to any of his little nerd hobbies anytime soon.
“Mom! What the hell are you doing coming into my room without asking? I could’ve been jerking off or something!”
“Geez, Aaron, could you not be so gross?” I approached him with a small chocolate birthday cake and sat down on the bed. I saw his eyes follow my body the whole way there, stopping to stare at my large breasts in my green sweater and, of course, everyone’s favorite: my large behind. I was pretty numb to it at this point because my whole life, my name and introduction had usually been followed up with, “That girl with the great ass.” Of course, that was a lifetime ago, but I’m sure if Aaron had any in-person friends, they would be saying similar things to him. I pulled my sweater down to cover my jean-clad butt and continued. “Now, blow out your candles and make a wish.”
He closed his eyes, leaned forward, and blew the candles out with tremendous intensity. He had big, thick glasses which made his eyes seem like they were always in danger of popping out of his face, and he was slightly overweight from all the fast food he constantly ordered.
“What did you wish for?” I asked legitimately.
“I can’t tell you or it won’t come true,” he responded. We made small talk about his plans for today, though he didn’t ask much about mine, before I finally found the right opening.
“Hey son, I wanted to say that now that you’re 18 and officially an adult, our relationship is going to have to change a little bit.” His eyes grew wide. Here goes nothing. “I’ve been nice enough to let you kind of do things on your own here in your room, but the fact is you are immature for your age, and that’s my fault.” I had read in a parenting book that taking blame can sometimes help the child break out of his own habits. “So, in order to encourage you, I’m giving you an ultimatum. If you don’t get rid of all of your nerd stuff and clean this room, and if you don’t get a job or find a university to study at in the fall, I’m going to have to kick you out of the house.” I could see how the last words hurt him, and even though my son could use a lot of help and was a gross, immature pervert a lot of the time, it still broke my heart a little—but I stayed strong.
Tears welled up in his big eyes. “You can’t do that. It’s illegal.”
“It’s perfectly legal, and I can do it since I own the house.” I hadn’t worked the last 20 years in accounting for nothing. This house was mine, bought and paid for. “One day, after you’ve worked for a while, you can have your own house and fill it with everything you want. You can have pictures of these half-dressed women and video games, but you’ll learn soon enough that all that is something you have to work for. It’s not just going to fall into your lap because you have had a very privileged life, young man. And it’s time that you realize that!” Somewhere within my phrasing, I found a strength I didn’t know I had.
He was about to complain again, but the words died in his throat. For the first time, he looked around and realized what a mess everything was. He looked straight at me, his eyes still watery and the room smelling like old chicken nuggets. “Are we still going to Animecon this weekend at least?”
I had completely forgotten that I bought two tickets to the convention, since I had been taking him since he was in sixth grade. Before I could respond, he said, “If I’m really saying goodbye to all this stuff, it would be kind of nice to give it a farewell like we used to. One last trip, just the two of us. Just the weekend, Friday through Sunday.”
I sighed. The last time I went to one of these conventions, it seemed like more an excuse for women to promote their OnlyFans with naughty costumes than an actual convention to express interest, as it had been in the years before. But I suppose since it will hopefully be the last nerd thing my son ever does, I can make one last exception.
“Sure, I’ll go.”
Thursday
So, that’s how we found ourselves at our local convention center surrounded by tables where people were trying to sell cheap knock-off merchandise, playing cards, voice actors from shows I’ve never heard of, and, of course, the ridiculous cosplay. Eventually, we got to a line for the voice actor of some bubblegum princess in a cartoon, and it was two hours long. Aaron looked at me with puppy-dog eyes.
“This is your convention. If you want to spend your time waiting in line for one autograph and a 30-second conversation, that’s up to you.” So he planted himself, and I took the time to walk around and get my steps in.
After about 10 minutes of walking, earbuds in and trying to gain a deeper understanding of this strange world, I was approached by some teenager in a cloak. “Hello, ma’am. We’re running our own unofficial cosplay competition.” It was only then that I noticed the four other cloaked figures behind him, each one dirtier than the last. I guessed that this guy was the most charismatic.
“Well,” I said dismissively, while pointing to my jeans and oversized T-shirt, “I’m not really into cosplay. But you kids have fun.”
A taller cloaked figure stepped out from the back and said, “You don’t have to be into cosplay, ma’am. We can help you out and set you up for success!”
“Yeah!” another one chimed in. “The actual competition isn’t until Sunday. Right now we’re just recruiting, and to be honest, you have the perfect build for a couple of my favorite characters!”
It was a little unnerving, if not slightly flattering, that these boys wanted me to dress up for them, but I was certain in my opinion, so I told them directly, “I’m not into cosplay. End of story. The women in those cartoons are barely dressed.”
The one closest to me looked me directly in my eyes, and it was only then that I noticed how intense his were. They were so pure and blue that it felt like, for a second, I was falling through the sky. After what seemed like an hour, he spoke. “But I bet you would love to try cosplay just for us.”
“Of course, I will try it for you guys!”
They lit up at that. I mean, while I was at this convention, I might as well try some of these outfits. No one said they had to be anything skimpy, after all. One of the cloaked boys ran forward with a bag labeled: Lady Tsunade from Naruto. I sighed.
I clutched the bag to my chest, my heart hammering a nervous rhythm against my ribs as I pushed into the crowded convention bathroom. Why was I doing this? I’m an accountant. I’m a mother. I’m supposed to be the one setting boundaries, not breaking them. But every time I tried to turn back, a foggy, warm sensation filled my head, reminding me that I had to do this. I really wanted to show those boys this cosplay. I couldn’t remember exactly why it felt so life-or-****, but the urge was a physical weight, pushing me into a stall.
I pulled the “outfit” out. The gray blouse was essentially two strips of silk held together by a prayer. As I slid it on, my tits, which I usually kept under wraps, seemed to double in size, shoved upward and outward until the nipples were practically peeking over the edge of the plunging V-neck. Then came the shorts. They were so small they looked like they belonged to a woman half my size, and as I pulled them over my ass, I heard the fabric groan. My huge, heavy MILF cheeks were completely uncontained, the bottom of the spheres hanging out from the leg holes, while the center seam vanished into the depths of my crack.
I looked in the mirror and felt a wave of nausea. I looked like a pornographic caricature. My blonde hair was messy, my face was flushed, and my body was being offered up on a silver platter.
I stepped out of the bathroom, and the world seemed to stop. I could feel the heat of a hundred stares. Men, and even some teenage boys who looked like my son, openly gawked at the way my massive tits bounced with every step and how my heavy ass jiggled uncontrollably in those tiny black shorts. I felt exposed, humiliated, and utterly dirty. I kept my head down, my face burning, until I finally reached the corner where the cloaked boys were waiting.
As soon as I stepped into their circle, the embarrassment was thick enough to **** me. I stood confident despite it all; after all, I wanted them to see me in this outfit, but that doesn’t mean I like it.
They were too busy devouring me with their eyes. The dirty one in the back was literally rubbing his thighs, his breath coming in ragged, wet gasps as he stared at the way my thighs rubbed together under my massive backside.
The blue-eyed leader stepped forward. He didn’t look “happy”—he looked triumphant. He reached out, his fingers brushing my skin, but I quickly slapped them down. “Watch yourself! Of course I wanted to wear this for you boys, but don’t think this means that I’m some floozy who enjoys showing off.” I retreated slightly, my bag right behind me, ready for me to retreat back to my life as an accountant.
“Change back? Why would you want to do that?” He leaned in, his blue eyes expanding until they were all I could see. Suddenly I was falling again. “Actually, Stacy, you love dressing like this. You love your sexy MILF body and are addicted to the way these ‘losers’ look at you. Especially us. You really want to impress the Cloaks.” All his boys cheered at that one. “Also, when you dress in cosplay, you aren’t an accountant. You are a horny, slutty version of whatever you are cosplaying. You will still know it’s cosplay, but you will act the part. In this case, you are the horny Fifth Hokage, a powerful healer in the ninja world who will do anything to make us feel better.”
I looked down at my massive, heaving tits. I looked up at the boys. “You guys are so hot. Can I please show you my cosplay!” I jumped up and down, knowing the effect that would have on my pretty titties.
“Sure, slut. What are you?” The blue-eyed one asked, cool as a cucumber.
“I’m Lady Tsunade, the 5th Hokage!” I let my voice drop to a sexy, pouty thing that I only used in the bedroom. “And I’m a healer. So why don’t you all just let me know how I can help.”
The chubbiest one spoke up, “I’ve never seen a striptease before and I think it’s making me sick to my stomach.”
“Well, why didn’t you say so? What kind of leader would I be if I didn’t help out my citizens?”
“Well technically, you would refer to us as—” His friends shushed him, but I doubt he would have said anything anyway as I reached for the wide dark sash at my waist. I pulled it slow, my eyes locked on theirs, letting the green haori slide off my shoulders and pool at my feet. I arched my back, thrusting my massive, silk-wrapped tits forward so they could see the way the fabric strained against my heavy weight. I turned around, giving them a long, lingering look at my enormous ass, shaking it just enough to make the spandex ripple over my cheeks.
“Is this what you want?” I asked, looking over my shoulder with a hungry smirk.
I didn’t wait for an answer. I knelt down on the concrete floor between the two most pathetic-looking boys in the group. They were shaking, their cheap jeans already tented. I reached out with both hands, my palms hitting the rough denim of their crotches.
“I think we have a blockage in our dick area,” one of the boys whispered.
I unzipped them both at once, the sound of the sliders loud in the quiet corner. I pulled them out, two pale, **** things, and wrapped my fingers around them. I started to pump, my hands working in a rhythmic, professional blur as I looked up at them, my blonde hair falling over my face. For a second, I considered how I got here. I was a mother, an accountant, and a respectable woman five minutes ago. But, I guess I still was those things. I just hadn’t realized how much I enjoyed cosplay. I continued to pump their cocks vigorously. The motion caused the leftover silk that was covering my hard nipples to fall down, allowing my tits to fully come into view. Just because I like the cosplay doesn’t mean I can’t be respectable.
One of the boys blew his load onto the side of my face and hair. The other one wouldn’t stop, so I quickly opened my mouth so he could spray it onto my face. Anything to help a “penis blockage.”
The one with blue eyes rushed forward, “Let me go next. I’m the one that controlled her.” But before he could continue, there was a knock at the door.
“Hey, you guys only had this room reserved for 20 minutes. It’s time to go or I’ll be **** to call security.”
“Fuck!” one of the boys said. “But I didn’t even have a chance to have this MILF jerk me off.”
“Hey!” I said. “I’m not some blonde MILF with a big ass that you can just use.” Sure, I love to be stared at and just want to make you both happy, but I’m still respectable, and besides, I should go anyway; my son is waiting for me.
The one with blue eyes spoke again, “Let us see what your son looks like.”
I showed them a picture from my phone. “He’s a little immature, kind of like you guys. He loves his cartoons and his scantily dressed women, but of course, he doesn’t have a MILF like me to help take care of him. Although if I’m still in cosplay when I get home, I guess it won’t hurt.”
“No.” He looked me directly in the eye. “I want you to tease your son, and dress sluttier than ever, and start to act kind of like him, but it is very important that you never touch him, no matter how much you tease him or how much he asks. You are ours to be used. You’re going to change back into your regular clothes, and you won’t remember seeing us, but you will remember everything I’ve instructed you. Tonight, you will find a way to make yourself a new cosplay you can wear, especially something that emphasizes that big fat ass of yours. You will act as if it’s the most normal thing in the world for you, and when you see our cosplay competition, you will be begging us to enter. Do you understand?”
“Yes, Master.”
Aaron was smiling the whole drive home. He held up the picture of his favorite character with his favorite actress’s autograph. “I can’t wait to frame this. I hope you weren’t too bored while I was waiting in line.”
I couldn’t remember exactly what I had done while he waited, but I did remember that I had fun. More fun than I thought, actually. “It was actually kind of a blast. I’m not saying that you don’t have to clean out your room from all of this stuff, but I can kind of see the appeal.” My hand fidgeted with my shirt. Did I always dress this frumpy? How is anyone going to look at my big boobies if they can’t see that I have them? Maybe they can. I turned to my son and lowered my right arm, only driving with the left, and said, “Can you tell I have big tits through this shirt?”
Aaron nearly choked on his own spit, his face turning a deep, violent shade of red. “M-Mom? What are you—why would you say that?”
“I’m serious, Aaron,” I said, my voice dropping into that sultry, breathy pout. I shifted in my seat, the denim of my jeans straining against my hips. “I just feel like maybe I’ve been hiding my best features for too long. Don’t you think a woman should be proud of what she has? I mean I’m a MILF. Shouldn’t I be proud of that?
“I... I mean, yeah, but—did you hit your head at the convention or something?,” he stammered, his eyes darting toward the window, though I could see him catching glimpses of my chest out of the corner of his eye.
I pulled up to a red light and unbuckled my seatbelt with a sharp click. “Oh, stop being so sensitive, sweetie. Just this morning you were jacking off. Maybe mommy is just ready to explore a new side of herself.”
I leaned over to the left, bracing my hands against the driver’s side door and the steering wheel, intentionally arching my back and thrusting my rear up and toward him. The position **** my jeans to stretch to their absolute limit, the fabric white-knuckled over the massive, rounded curves of my ass. I knew exactly what he was seeing: two heavy spheres of flesh barely contained by the denim. He was getting nervous. I liked it.
“Well, if you aren’t going to comment on my tits” I teased, looking over my shoulder at him with a playful smirk. “Does my ass at least look good in these?”
Aaron was paralyzed. He looked like he wanted to jump out of the moving car and stay there forever at the same time. “Mom, please, the light is green,” he whispered, his voice cracking.
“Not until you answer me,” I insisted, wiggling my hips just a fraction, feeling the power of his gaze. “Is it a good ass, Aaron? Yes or no?”
He squeezed his eyes shut, his chest heaving. “I... I- okay yes. Mom, please drive.”
I reached back and gave my right cheek a loud, resounding slap. The sound echoed in the quiet cabin of the car. The flesh jiggled violently from the impact, and Aaron’s eyes snapped open, wide and glazed with a mix of horror and forbidden fascination.
I giggled, a sound that felt far too young and far too naughty for an accountant, and slid back into my seat as I hit the gas. “See? That wasn’t so hard.”
I was already thinking about what I was going to wear tomorrow.
ENDTAG: Thanks for reading this commissioned story! On my Patreon you’ll get early access to the next chapters, and I also upload 1-2 new chapters every week which the community sometimes has opportunities to vote on, so it’s the best way to get consistent MC from me and see your fav stories come early ;)
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A mom who hates her son’s obsession with the local Anime Convention finds herself understanding it more and more.
Updated on Jun 9, 2026
Created on Jun 9, 2026
by BadgerAttack
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