I looked to see Sam curling the 10 lbs dumbbell with ease. There was a look of pure joy on her face. She made eye contact with me, but didn’t say a word. She swapped the weight to her other hand and began doing curls. I could see that her once twiggy arms were gaining mass.... wait not just mass.... they were gaining muscle.
She ditched the 10 lbs dumbbell for a 15 lbs. But that was too light for her. She ended up settling on a 35 lbs dumbbell. She knocked out another set as her arms bulked up with muscle. “Shit the mannequin...” I thought realizing her arms had stopped gaining muscle when they were the same size as the mannequin.
“O MY GOD!” She squealed. “This feels sooooo good!” She rushed over to me and gave me a tight hug around my waist. As I hugged her back I could feel the new muscle in her shoulders. She was a strong little shit now. Sam released her grip on me and hurried off to a leg machine. She plopped down on the seat and hooked her legs in... At the lowest weight she started doing leg extensions. It seemed like every couple reps she moved up in weight and her thighs looked meatier underneath the tightening overalls.... As he legs filled with muscle the reps took more effect.... Finally she knocked out her last rep. Her legs looked thick and muscular like the mannequin's....
I followed Sam as she rushed over to another machine. The overalls looked painted on at this. I could feel my cock stirring in my pants. “Keep it together.... You just had a blowjob like 45 minutes ago...” I thought as I followed her to the next machine. She proceeded to start knocking out hanging leg raises. I knew she would have a rippling 6-pack by the time she stopped.
She hopped off the machine with the biggest smile on her face. “I fucking love the gym.” She said as she hugged me again. Her short muscular body felt great pressed up against mine. She looked like a fitness model now.... but with a perfect pair of big natural breasts. I hadn’t intended for this to happen, but I wasn’t complaining either.
“Thanks for bringing me in here.” Sam said in a grateful tone. “It really helped.” She actually seemed sincere and she had that look in her eye again. “I know that you have something to do with what is going on.” The words took me by surprise. “So thank you for at least giving me the gym back.” She smiled then gave me an even tighter hug. “But I’d been even happier if you turned me back into a guy you knob-head.” She said in an almost flirty tone.
My head was spinning now. “Wait she knows I did this... but..... shit...” Sam smacked me on the ass.
“How about that food court now? These babies aren’t going to feed themselves.” She said flexing her bicep. I kind of grinned at the sight of her flexing “The douchebag is alive and well inside her.” I thought as I shook my head as the cute muscular girl in front of me.
“Okay. Let’s go.”