“I haven’t ran in a while, so I’m gonna use the treadmill.” You tell Russel as you both go into the new town gym, or ’The TG’ as the sign said.

You notice that the gym is empty, and then see a hot attendant give you a flirty wave.

“How’s it going… Marie?” You say, trying to sound casual as you read her name tag.

“You’re like, so funny!” She giggles as she slaps your arm playfully, “But we’ve totally gotta do something about this thing!” She says, grabbing your crotch and making you chub up.

“Welll umm, what do you wanna do with it?” You ask, trying to come off as playful and naughty.

“It’s like, totally not gonna be ME doing it” Marie giggles some more, giving your butt a playful tap that seems to make your legs begin to carry your body away from her.

Your body feels natural walking, and you don’t interfere as it gets on the treadmill. You feel your pudgy belly bounce a bit as you get on the treadmill, set to a light jog to warm you up. After a few minutes, the jiggle in your belly begins to dissipate. Your face twists into a surprised smile, and you could almost feel yourself become lighter with each step.

Soon you could feel a breeze on your thighs, and the bouncing stars again; but this time it’s… in your chest!! You try shouting in shock, but your body doesn’t flinch and just continues jogging. The transformation continues as you run, and it doesn’t take long for a filled C cup bra to form.

The bouncing becomes more intense with every passing second, but your attention is diverted to your crotch. You could hear a faint slurp, but your stride doesn’t change as the thirteen inch member you proudly adorn shrinks into feminine folds and a clitoris.

The lust you felt from your shapely body disappears as your sexual orientation shifts, and the thoughts of playing with your boobs later turn into daydreaming about filling your mouth with Russel’s cock.

Speaking of that devil; you think seductively, looking around the room to see your best friend's masculine physique. Your jaw would’ve dropped if you had control, where Russel stood minutes earlier was a petite blonde.

Russel was still completely unaware of the change, but he couldn’t take his eyes off your expanding beauty. He didn't even realize it was you several minutes earlier, and thought he was just creeping on a random babe at the gym.

Then he noticed the weights becoming more difficult to lift, and suddenly the awareness hit him. He no longer had control of his body though, and cursed to himself as his body skipped sexily over to the dumbbells.

He couldn’t believe how slim his manicured fingers were, and wanted to leave the rack when he saw the 2 pound weight his body was about to work out with. He could feel his demeanor become more feminine as he held the dumbbell, and his body followed suit as he curled. Both his mind and body becoming more feminine and sexy with each curl, he could feel his shirt loosen up as well for his now growing chest.

The feminine grunts eventually turned to panting moans as cleavage began to form between Russel’s inflating boobs, which filled with more fat each time he lifted the barbell. He wanted to stop, but his mind and sex drive demanded he look sexier. Russel forgot his name, and tried throwing the dumbbell to the floor when he began thinking of himself as Rose.

Her arm ignored that though, and her hips started expanding as sweat began to trickle down the sexy Rose’s chest. You wish you could just enjoy the show, but it’s hard when there’s so much distracting you. Your boobs never stopped growing, and your outfit was following the same skimpy playbook as Rose’s. You could feel much more jiggle as your top shrinks into a bikini, and each of your boobs become bigger than your head.

Your body has to stop running to keep your nipples from coming free, and it seems like you’re done with running for now.

Without the massive distraction from your boobs bouncing, you notice your hips and ass protruding intensely as you walk. You look back over to Rose, trying to ignore the fact that you have no idea where you’re headed, and your jaw drops. She’s jumping rope now, and laughing like she’s having an amazing time as her boobs slowly unleash from her top.

Your neck swivels to allow your eyes to stick on Rose’s tits, and you confidently walk forward. Next thing you know, your leg’s hiking up over a stationary bike seat. A surprised gasp escapes your lips as your skimpy shorts allow the small bump in the bike seat to slightly penetrate your folds, and you could feel your ass cheeks lift behind you as you sit down fully on the bike seat.

Your feet shrink a bit as they slip into the straps, and you could feel erotic jiggling through your thighs and womanhood as you pedal.

You think your boobs were big before, but you could tell they’re gonna be incredible by the time you would finally be let off the bike. You could already feel the bounce increase, and even your ass slowly lifts up behind you more as your legs work the magic pedals.

Looking back up from your cleavage you could feel more control returning, but your mind was becoming more and more slutty. Another turn toward Rose makes you pine for her small frame, and you could feel your bisexual side flare up a bit as you stare at her bouncing boobs.

Was that an exercise? Who cares she looks like she’s having fun! She’s always having fun though! Rose is such a total ditz!!!

Soon Rose’s bust became too big for her top, and her boobies came pouring out when the clasp on her bra broke.

You feel your legs slowing down, and then with your own willpower you hop off the bike. You grimace as your body jiggles, but a smile stretches across your plump lips as you realize you know the perfect exercise to reduce that pesky jiggle!

You make your way over to the rowing machine, making sure to drop Mark, the hot gym attendant your number and a flirtatious wave as you make sure to pass by the only man in the gym.

Your pussy flushes with moistness as you begin to bring the bar down toward your crotch, and you can’t help but giggle as you’re filled with blissful arousal. You continue laughing in pure erotic satisfaction as your body sheds weight, or rather moves all the fat you have to your perfect boobs and inflating bubble butt with each tug of the bar.

Before long your torso’s flatter than you had thought possible, and your ass is bigger than your hips could handle. You can’t help but stare in Rose’s direction, she’s definitely become curvier and prettier than you. You felt zero jealousy thinking that, and were a bit surprised when you both seductively approached the attendant in sync with pursed lips and fuck me eyes.

He simply chuckles and escorts you to the back room, telling you to stay as walks out and locks the door. You hear his footsteps slowly leave, and realize Rose and yourself were both extremely attracted to each other.

Your stomach flutters with butterflies as you watch Rose play with her body, clearly her arousal and transformation was miles past your own. A craving to be touched fills your soul, and you could do nothing as she begins groping your luscious body.

A sultry moan vibrates through your mouths as your tongues dance, and your eyes close while Rose plays with your breasts.

A shiver runs down your spine as you orgasm as a woman for the first time, and you feel all previous memories leave you.

“Welcome to your new life ladies, and thank you for all that masculine energy! Every time new members join I become a bimbo, but I slowly absorb all their masculine energy through our workout equipment while releasing my bimbo pheromones into their systems!!

You two are the first members, so I’ll let you help yourself to even more workouts. You both still have plenty of masculine energy for me to absorb, and could become infinitely sexier while I become more manly!!”

Any questions?” The loudspeaker voice asked.  

“Like, thank you!! But could you like, totally bring that hunky guy back?! He was so sexy!!” You respond in a ditzy voice, lost in your new lower iq mind and body’s cravings.

Continued?