Years ago, I took an aerobics class a few times per week on the small post in Europe where I was stationed as a soldier in the 80s.
Aerobics was a new alternative to fitness at that time in the army, and I decided to try it because I've never been much of a runner.
There were several classes per week, given by one of the female soldiers in my unit. She happened to be very attractive and in excellent shape. Also, I was usually the only male in the classes, which was another motivator for me.
I loved watching the women dance and sweat ...some of them wore some pretty sexy outfits which added to my enjoyment.
I'd been going to classes in the evening several times per week for some months, and was getting in pretty decent shape when I discovered through the grapevine that the instructor, Angie, gave classes at her home on the weekends as well for an extra charge.
Now, I guess I should describe Angie a bit. She was very beautiful; long, blonde hair, blue eyes, and a figure honed from years of exercise. One of her best assets in my opinion were her breasts...they were largish, and her tight exercise outfits showed them off well.
In fact, watching Angie move in her tight outfits was one of the main reasons I went to her classes in the first place.
Anyway, one evening after class, I approached Angie in the gym and asked about her weekend classes at her home, and whether anyone could attend.
She looked thoughtful a moment, the smiled her perfect smile, while stretching on the floor. As she leaned forwards to stretch one leg, I noticed that her perfect breasts nearly spilled over the top of her outfit.
She told me that I was welcome to attend and gave me the address. The classes were on Saturday evenings at 7 pm.
The following Saturday, I arrived at Angie's place a few minutes before class. After ringing her doorbell, Angie greeted me in an outfit that I'd never seen before: light blue short shorts, a blue bikini top and tennis shoes. The rest of her was bare.
Her outfits at the gym were much more conservative, but I figured she could wear whatever she wanted in her own home. I didn't mind a bit.
I'd worn my gym shorts, an old t-shirt and tennis shoes for my workout as usual.
She led me through her spacious home and down a set of steps in the kitchen to a nicely built-out basement that served as her workout room.
There was a full-length, wall to wall mirror on one side of the room, mats and steps on the floor. The lightening was supreme. Basically, it was a basement converted into a gym.
There were two other women already there...one of whom I recognized from class: Wanda, a beautiful black woman who seemed to be at every class and an attractive red-head whom I'd not seen before.
Wanda was dressed similar to Angie, in short shorts, and a bikini top, only she wore leggings and her outfit was orange. I was admiring her when Angie introduced the other woman, Cathy...who wore a pair of pink gym shorts, a white t-shirt and workout shoes.
After introductions, we took up our spots behind our steps, while Angie moved in front of us and put on the music.
We started our warm up, progressing through basic steps to increasingly difficult ones. The routine was quite a bit different than the ones that Angie taught on base, and I found myself having a bit of difficulty keeping up.
Soon I was sweating bullets and breathing hard. The girls, however, appeared to be having no problems at all.
The routine wasn't my only difficulty though. Merely two feet from Wanda, I had to keep tearing my eyes off her sexy body every time she bent over.
I tried not to think about the situation. Here I was surrounded by three gorgeous, sweating women, moving and jiggling around me as they stepped, twisted and turned. My eyes gorged on each one in turn, over and over again...threatening a rise between my legs every few minutes.
Since I wasn't wearing underwear (I never wore underwear beneath my gym shorts), the situation was even more precarious. A hard-on would be more than obvious.
"Why don't you grab a bottle of water Jim?" Angie's voice broke my reverie just in time. Smiling at me, she indicated towards the small refrigerator against one wall.
Leaving my step for the moment, I went over and got a cold water from it.
Not only did I need the water, but I needed a moment to focus on something other than three hot rear-ends and sets of boobs moving and shaking around me.
Returning after a moment, I set my bottle down next to the step. I was about to return to the routine again, when Angie spoke.
"You know Jim, feel free to take off your shirt if you want; I know it's pretty hot in here."
She said it with her usual smile, in an offhand way, not missing a beat.
Glancing around quickly I saw that both Wanda and Cathy were involved in the step dance and took no notice.
Stripping off my soaked shirt, I tossed it aside, feeling a rush of coolness sweep over me. I was grateful for it.
After my brief rest, I took up the routine again, better able to keep pace. Angie worked us hard, putting us through step after step. She moved like a pro in front of us, her body bending, twisting and stepping with perfect time to the beats.
Glancing at Cathy, I caught her smiling at me, and wondered if she'd been checking me out.
My cock twitched, and I shook it off, concentrating again on the routine just in time to see Wanda bend over towards me. Her luscious, creamy ebony breasts hung in front of her, exposing quite an amount of cleavage.
Shutting my eyes tightly, I tried to think of other things, as my cock slowly rose in my shorts, determined to have a mind of its own.
I thought about my grandmother; I thought about football; I thought about how much I hated the song that was playing; anything to avoid a disaster in front of the women.
Just then, Wanda looked directly at my crotch.
Still bent over, she smiled at me from under her bangs...and my cock stiffened even more, creating a tent at the front of my shorts.
It was too late. Watching Angie swing her body around, watching her gorgeous breasts and tight ass jiggle in her outfit finished the job.
My cock stiffened to full mast, threatening to appear over the top of my waistband.
There was nothing I could do.
Angie, Wanda and Cathy all noticed my predicament. Angie smiled at me as I stepped and moved with my cock pressing hard into the front of my shorts...which only made it throb harder.
"Okay, grab your weights!" Angie called out between songs.
Reaching down, we all picked up the small set of dumbbells that lay at the sides of our steps.
Picking up the routine again, we stepped and curled; stepped and curled.
To my horror, I realized that my gym shorts were beginning to ride down my hips somewhat with my movements.
After a moment, I glanced in the mirror behind Angie and saw that they had ridden down to just over my hips, exposing an amount of lighter skin beneath my waistband.
I caught Wanda smiling at me.
The routine was quite intense. Even though the dumbbells were light, Angie was putting us through a grueling number or repetitions.
"Curl and thrust!" she called out again, as we curled the dumbbells and thrust our hips forward...causing my shorts to ride down even further.
Suddenly, I felt coolness on my butt cheeks. I realized that my shorts were down past the tops of them.
Glancing around quickly, I saw that none of the women seemed to care.
My cock pounded at the thought. I wondered if I would soon be naked in front of them, and what they would say if that happened.
