An Unseen Workout Partner
A Shrunken Roommate (Re-upload)
chapter 17
by
copier
· original author:
lilmonib
"Woah, this sure is silky. Must be Quinn's new fabric softener..." Morgan remarked shrugging, making your heart sink as the athletic brunette stared down at you uncaringly, totally unaware she was holding her own roommate in her own hands. "Mmmm I bet these're going to feel even better once I put them on," she mused, letting you fall between her feet and stepping into you, only terrorizing you further as you now peered up at the tall and toned giantess, her fully nude form still shaking you to your core from embarrassment and desire.
You felt like you must be trembling in fear as you were raised steadily up towards the massive and taut rear of your roommate, but if you were even the decently observant Morgan didn't feel a thing as she simply slid you along the length of her silky thighs, savoring your equally smooth texture as you glided along her skin. Upon reaching her bulbous ass, you came to a halt as you were jammed into the supple flesh, getting a face full of the stubborn and firm booty.
A few fierce tugs from the hands gripping you on either side of Morgan's hips only seemed to be jiggling the resistant glutes, and you were worried your limbs may fly out of their sockets. until one final yank delved you powerfully past the threshold, sending your face rocketing rapidly into the crack of the giantess. "Sheesh, this must actually be a new pair, they're still pretty stiff. They are damn comfy for being so tight though. Oh well, they'll stretch to fit me perfectly just like the others after my usual routine, if they last that is..." you gulped as you managed to hear the brunette's voice booming from between her cheeks, you understood she had an expansive rear but you didn't like the sound of her having to break in her stubborn intimates.
Morgan slid on a pair of black leggings, compressing the mass of her ass into the tight pants and thus squeezing the life out of you as all the ass flesh around you caved in. Taking her first steps in you to admire her toned figure in the mirror, you were already feeling the massive difference in the twins' behinds. While Avery's booty was jiggly and soft, Morgan's gave you no mercy, each step causing a powerful glute to squeeze you into it's own twin. You felt a hand stroke you as Morgan took notice of your no-show design before finishing getting dressed and heading down the stairs to meet her other roommates.
Taking an apple with her for a light snack, Morgan grabbed her things before waving off to her friends. "Alright, I'll see you guys after work!" Avery excitedly ran past Morgan, giving her a playful slap on the rear, reverberating through you like mad.
"Oh, I forgot you had work today! Have fun!" Avery sang, skipping off to enjoy her day-off lazing around.
"Don't forget to give Hunter some kind of break!" Morgan called after her before blowing out a disapproving sigh, knowing correcting her sister's rambunctious behavior was an exercise in futility. She couldn't help but dote internally on how sorry she was for the fate that had befallen you, while simultaneously wedging up her thong just a bit before heading out of the house. The irony was lost on you as you felt hands grip you on each side before yanking you deeper, causing your skin to finally meet with the deepest reaches along Morgan's hips.
Quinn shared Morgan's dejected look, but decided she would try and cheer her up saying, "Don't worry about him so much, Morgan. I'm off today so I'll see if I can make any progress on the legal front." Morgan gave her a grateful smile, heading out the door and hopping into her car. "Just as soon as I'm done chilling out for a while..." Quinn mumbled, not exactly wanting to spend her last day off with her nose buried in her laptop reading legal jargon. Quinn was still shifty on if it was really her job to be helping you out of this mess in the first place, sure you seemed like a nice enough guy, but couldn't someone else help you out? The longer this ordeal went on, the less Quinn seemed to worry it was that grave of an issue.
You would've begged to differ as you accompanied Morgan to work, dragged to and fro within her rear, already feeling like Morgan was making good on her quest to stretch you to match her size. You sat in silence as your world finally came to a crushing stand still, Morgan reaching the gym computer to check what times she had classes and clients to train that day. "Huh, nothing all the way until two. Guess I'd better get my workout done early then." She mumbled under her breath.
Thankfully, an aspect of the job Morgan adored, she was already perfectly dressed in her athleisure wear, only needing to take off her uniform top, exposing a straining sports bra that had seen better days as it struggled to contain the gorgeous giantess's generous curves. Already feeling pumped, Morgan quickly came to a treadmill, deciding a quick warm-up would be an excellent start to the days training.
Unfortunately for her unknown little passenger, what could be considered a warm-up for a well-built trainer like Morgan would be filed under most normal women's harshest runs. You remained clueless to what was going on as your main read on Morgan's day was the amount of pressure you were put under, but you started to get an idea as Morgan picked up her pace into a starting jog. Any thoughts of that dainty little thong she had slid on that morning totally out of mind as she put her focus onto herself and her body.
You weren't sure if it was due to the impressive firmness of Morgan's ass, or the constricting leg wear she chose, or possibly a combination of the two but you did groan as you felt how little give Morgan's booty seemed to have, rather opting to simply pull and stretch you with each lunge forward of Morgan's toned thighs. And as if that wasn't total torment enough, the heat soon started to escalate making you feel like you were being baked in some kind of sauna.
With the intense training came the intense heat, and that rapidly brought along with it something you hadn't exactly been through under Avery, a downpour of salty sweat. Sure Avery sweat, it was pretty difficult not to with a rear her size, but it was nothing like the grimy fluid that was quickly building up within your roommate's large booty. Morgan merely trudged on, focused entirely on her breathing rather than the light trickle of sweat that was building along her crack. After all, she was used to it after thousands of workouts by now. What she shouldn't have been used to was the tiny person forced to deal with it and her wobbling backside, but she was totally oblivious to that fact due to just how seamless her thong felt along her skin.
After her light warm-up, Morgan's mind actually seemed to drift towards your prison as she toweled off. "How strange, my butts not even sweaty yet! I must not be training hard enough," she noted frustrated, still gathering her usual sizable lather from under her arms and chest and wringing it out. Not building a sufficient sweat wasn't going to fly on her watch, as she got invigorated to truly get her burn on.
What followed was a seemingly never-ending chain of soul-crushing booty training or plain crushing as Morgan sat on a spare bench. Through each lunge, along every squat, you stretched and contorted along with Morgan's wide hips, being pushed to your limits in a totally different way from your captor. It genuinely felt like Morgan was doing her absolute best to squeeze as much life out of you as possible as she intimately flexed and squeezed her glutes all along your body, wholly unaware the torment her friendly little roommate was going through under her sweltering ass.
What had formerly been like a burning sauna rapidly degenerated into a boiling steam room as any sweat that wasn't purely threatening to drown you in it's toxic embrace merely clogged your lungs with it's sour fog. Just what Morgan loved most about her workout gear, knowing it's ability to contain any and all salty emissions within it's tight fabric and not embarrass her by shining through. You cursed every time you had ogled a pair of spandex, as they were now serving as an airtight shield retaining all of Morgan's sweat just for you to deal with.
You cried out as Morgan plopped her ass down after a particularly grueling, for the both of you, squat set. You never thought you'd believe this, but after just a few hours under Morgan, you were seriously starting to miss Avery! Flashes of the cute and bouncy pink-haired girl ran through your mind, even of her plush and pillowy ass, as her very own sister once again stood, ready to dish out more torture. At least Avery wore frilly skirts and fuzzy pajamas, from what you could remember of Morgan's wardrobe, you were going to be dealing with tighter and tighter leggings and shorts throughout your time under her!
After another grueling and soaking hour, Morgan seemed to have finished, realizing the time and seeing it was time for her first client of the day. It was only now, with Morgan's mind off punishing her body, that she realized her ass was still hardly too sweaty. Morgan purred as she quickly came to the realization this new thong must be particularly absorbent, placing a thorough mental note on taking full advantage of that moving forward.
Drearily for the boy jammed in her searing rear, Morgan opted to simply dry off naturally after her intense training, having no spare clothes and not too worried she needed them anyways. She was in a gym, and would have far more work to do once the classes began anyways. Simply spritzing a bit of perfume she kept on hand, Morgan concealed her feminine musk, bounding her way off to her first client with her handy assistant in tow.
You felt like you must be trembling in fear as you were raised steadily up towards the massive and taut rear of your roommate, but if you were even the decently observant Morgan didn't feel a thing as she simply slid you along the length of her silky thighs, savoring your equally smooth texture as you glided along her skin. Upon reaching her bulbous ass, you came to a halt as you were jammed into the supple flesh, getting a face full of the stubborn and firm booty.
A few fierce tugs from the hands gripping you on either side of Morgan's hips only seemed to be jiggling the resistant glutes, and you were worried your limbs may fly out of their sockets. until one final yank delved you powerfully past the threshold, sending your face rocketing rapidly into the crack of the giantess. "Sheesh, this must actually be a new pair, they're still pretty stiff. They are damn comfy for being so tight though. Oh well, they'll stretch to fit me perfectly just like the others after my usual routine, if they last that is..." you gulped as you managed to hear the brunette's voice booming from between her cheeks, you understood she had an expansive rear but you didn't like the sound of her having to break in her stubborn intimates.
Morgan slid on a pair of black leggings, compressing the mass of her ass into the tight pants and thus squeezing the life out of you as all the ass flesh around you caved in. Taking her first steps in you to admire her toned figure in the mirror, you were already feeling the massive difference in the twins' behinds. While Avery's booty was jiggly and soft, Morgan's gave you no mercy, each step causing a powerful glute to squeeze you into it's own twin. You felt a hand stroke you as Morgan took notice of your no-show design before finishing getting dressed and heading down the stairs to meet her other roommates.
Taking an apple with her for a light snack, Morgan grabbed her things before waving off to her friends. "Alright, I'll see you guys after work!" Avery excitedly ran past Morgan, giving her a playful slap on the rear, reverberating through you like mad.
"Oh, I forgot you had work today! Have fun!" Avery sang, skipping off to enjoy her day-off lazing around.
"Don't forget to give Hunter some kind of break!" Morgan called after her before blowing out a disapproving sigh, knowing correcting her sister's rambunctious behavior was an exercise in futility. She couldn't help but dote internally on how sorry she was for the fate that had befallen you, while simultaneously wedging up her thong just a bit before heading out of the house. The irony was lost on you as you felt hands grip you on each side before yanking you deeper, causing your skin to finally meet with the deepest reaches along Morgan's hips.
Quinn shared Morgan's dejected look, but decided she would try and cheer her up saying, "Don't worry about him so much, Morgan. I'm off today so I'll see if I can make any progress on the legal front." Morgan gave her a grateful smile, heading out the door and hopping into her car. "Just as soon as I'm done chilling out for a while..." Quinn mumbled, not exactly wanting to spend her last day off with her nose buried in her laptop reading legal jargon. Quinn was still shifty on if it was really her job to be helping you out of this mess in the first place, sure you seemed like a nice enough guy, but couldn't someone else help you out? The longer this ordeal went on, the less Quinn seemed to worry it was that grave of an issue.
You would've begged to differ as you accompanied Morgan to work, dragged to and fro within her rear, already feeling like Morgan was making good on her quest to stretch you to match her size. You sat in silence as your world finally came to a crushing stand still, Morgan reaching the gym computer to check what times she had classes and clients to train that day. "Huh, nothing all the way until two. Guess I'd better get my workout done early then." She mumbled under her breath.
Thankfully, an aspect of the job Morgan adored, she was already perfectly dressed in her athleisure wear, only needing to take off her uniform top, exposing a straining sports bra that had seen better days as it struggled to contain the gorgeous giantess's generous curves. Already feeling pumped, Morgan quickly came to a treadmill, deciding a quick warm-up would be an excellent start to the days training.
Unfortunately for her unknown little passenger, what could be considered a warm-up for a well-built trainer like Morgan would be filed under most normal women's harshest runs. You remained clueless to what was going on as your main read on Morgan's day was the amount of pressure you were put under, but you started to get an idea as Morgan picked up her pace into a starting jog. Any thoughts of that dainty little thong she had slid on that morning totally out of mind as she put her focus onto herself and her body.
You weren't sure if it was due to the impressive firmness of Morgan's ass, or the constricting leg wear she chose, or possibly a combination of the two but you did groan as you felt how little give Morgan's booty seemed to have, rather opting to simply pull and stretch you with each lunge forward of Morgan's toned thighs. And as if that wasn't total torment enough, the heat soon started to escalate making you feel like you were being baked in some kind of sauna.
With the intense training came the intense heat, and that rapidly brought along with it something you hadn't exactly been through under Avery, a downpour of salty sweat. Sure Avery sweat, it was pretty difficult not to with a rear her size, but it was nothing like the grimy fluid that was quickly building up within your roommate's large booty. Morgan merely trudged on, focused entirely on her breathing rather than the light trickle of sweat that was building along her crack. After all, she was used to it after thousands of workouts by now. What she shouldn't have been used to was the tiny person forced to deal with it and her wobbling backside, but she was totally oblivious to that fact due to just how seamless her thong felt along her skin.
After her light warm-up, Morgan's mind actually seemed to drift towards your prison as she toweled off. "How strange, my butts not even sweaty yet! I must not be training hard enough," she noted frustrated, still gathering her usual sizable lather from under her arms and chest and wringing it out. Not building a sufficient sweat wasn't going to fly on her watch, as she got invigorated to truly get her burn on.
What followed was a seemingly never-ending chain of soul-crushing booty training or plain crushing as Morgan sat on a spare bench. Through each lunge, along every squat, you stretched and contorted along with Morgan's wide hips, being pushed to your limits in a totally different way from your captor. It genuinely felt like Morgan was doing her absolute best to squeeze as much life out of you as possible as she intimately flexed and squeezed her glutes all along your body, wholly unaware the torment her friendly little roommate was going through under her sweltering ass.
What had formerly been like a burning sauna rapidly degenerated into a boiling steam room as any sweat that wasn't purely threatening to drown you in it's toxic embrace merely clogged your lungs with it's sour fog. Just what Morgan loved most about her workout gear, knowing it's ability to contain any and all salty emissions within it's tight fabric and not embarrass her by shining through. You cursed every time you had ogled a pair of spandex, as they were now serving as an airtight shield retaining all of Morgan's sweat just for you to deal with.
You cried out as Morgan plopped her ass down after a particularly grueling, for the both of you, squat set. You never thought you'd believe this, but after just a few hours under Morgan, you were seriously starting to miss Avery! Flashes of the cute and bouncy pink-haired girl ran through your mind, even of her plush and pillowy ass, as her very own sister once again stood, ready to dish out more torture. At least Avery wore frilly skirts and fuzzy pajamas, from what you could remember of Morgan's wardrobe, you were going to be dealing with tighter and tighter leggings and shorts throughout your time under her!
After another grueling and soaking hour, Morgan seemed to have finished, realizing the time and seeing it was time for her first client of the day. It was only now, with Morgan's mind off punishing her body, that she realized her ass was still hardly too sweaty. Morgan purred as she quickly came to the realization this new thong must be particularly absorbent, placing a thorough mental note on taking full advantage of that moving forward.
Drearily for the boy jammed in her searing rear, Morgan opted to simply dry off naturally after her intense training, having no spare clothes and not too worried she needed them anyways. She was in a gym, and would have far more work to do once the classes began anyways. Simply spritzing a bit of perfume she kept on hand, Morgan concealed her feminine musk, bounding her way off to her first client with her handy assistant in tow.
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April 23, 2025
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