I've always been one for routine, and my fitness regime was no different. 

My gym was only open to residents of my apartment complex, located no more than a two-minute walk across the road from my front door. I'd established that the optimal time on a Monday was between 10:30 a.m. and 11:30 a.m. It suited my work schedule and was usually relatively quiet.

So, on this particular Monday, after a strictly regimented, uninterrupted forty-five-minute workout, I headed for the exit.

I was walking past the row of treadmills when I saw her, jogging casually with headphones in. I'd love to claim I internally pondered her choice of music and continued on my way, but alas no. In reality, I practically stopped dead in my tracks, shamelessly admiring the hypnotic sway of her breasts. 

She was diminutive in stature, but her tits were anything but. Despite their prominence, she was completely in proportion. 

Wearing nothing more than a sports bra, they teasingly bounced, up and down, up and down, with each stride she took. Her nipples almost pierced the thin material, the friction seemingly stimulating the sensitive buds. My unrelenting gaze had evidently alerted her to my presence. She turned her head, and our eyes met. I had been standing there only a matter of seconds, but as the inappropriateness of my attention dawned on me, I feared her reaction to my blatant staring.

To my surprise, she smiled. It was a smile projecting more than mere politeness. It felt teasing. Playful and erotic. And I was sure she looked me up and down, appraising me physically, just as blatantly as I had her.

Dragging myself back to reality, I smiled back, and, finally, continued on my way.

I should have headed home, as my meticulously planned schedule demanded. 

I don't know if it was her enchanting smile, her very obvious assessment of my physique, or the ever-growing hard-on pulling against my gym shorts. 

Whatever the reason, I didn't make it to the exit. 

The chest press machine behind her treadmill was unoccupied. It just so happened it offered a perfect angle to continue staring, I mean, work out. 

With one eye on my machine and the other fixed on her, I set the weight as low as possible and absentmindedly worked it back and forth.

Contrary to my usual precision, I didn't even count the reps.

It was as I took in her full stature that I considered it strange I hadn't seen her in here before. Perhaps she kept a less regimented schedule than I did. Maybe she'd just moved to the area. It could be she was simply visiting family.

In any event, it was abundantly clear she dedicated plenty of time to her fitness. The sports bra covered her breasts, but below it lay exposed a smooth, flat stomach. Her abs became more defined with every breath she took. 

Skin-tight leggings covered her bottom half, the steady pace of her jogging causing them to ride up and tightly hug her perfectly round arse cheeks.

It was hard to divert my gaze, and I caught myself still ogling as she hit the stop button. With elegance and grace, she dismounted the machine.

I quickly feigned strenuous exertion as she walked past, 

She glided past me, glancing in my direction with another smile; a look which sparked a pang of shame inside me, for it so clearly expressed her understanding of my perversion.

A little embarrassed, and perturbed with my lack of subtlety, I waited until she rounded the corner towards the exit before finally making my way own way out.

I was just about to hit the door release button to leave when I heard an urgently whispered "pssst," from behind. I turned to see her standing in the entrance to the ladies changing rooms, beckoning me to follow. I glanced around furtively, making sure no one was watching. Satisfied we were alone, I followed. I'm pretty sure I'd be banned for life if I were caught wandering around the women's changing rooms, a prospect which would seriously inconvenience me. Primal arousal and her undeniable allure clouded my judgement such that I concluded the risk was well worth taking. 

I followed her inside, past the lockers and the toilets. It seemed we were alone.

She turned and gestured for me to hurry as she made her way into the shower block. Walking to the furthest cubicle, she flung her towel over the top of the door, stepped inside and beckoned me to join her.

Before the door had even swung closed, she pulled her leggings down to her ankles and nonchalantly kicked them away. My eyes fixed on her smooth-shaven cunt, a sheen of sweat (or arousal?) visible across the prominent outer lips.

I looked back up to her face, her eyes penetrated mine as she - very seriously - put a finger to her lips to "shhh" me. 

As I nodded submissively, she hooked her fingers under her sports bra. She slowly lifted it up and over her breasts, squeezing them together and pushing them upwards. Finally freed from the constriction, they plopped back to their natural position with a satisfying jiggle, her top joining her leggings; discarded in the corner.

She stood before me, completely naked, proud, unashamed, and - so it would seem - immensely horny.

My instinct was to strip off my clothes and fuck her senselessly, but everything thus far indicated she was dictating proceedings, and I saw no reason to change that.

She turned the shower on, but stood outside its steady stream, the water splashing off the tiled floor onto our ankles. 

With a step towards me (more of a half step, such was the confined space), she pushed me against the opposite wall. Her hands slid under my shirt, her soft fingers caressing my chest. She brushed her nails over my well-defined abs, nodding her approval. 

My t-shirt joined her garments on the floor as she yanked it over my head. 

Wasting no time and saying nothing, she hooked her fingers into the waistband of my shorts, sliding them down to the wet floor. In the same fluid motion, she sunk to her knees, lifting my feet one by one to remove my shorts completely. Tossing them into our - now complete - pile of clothing, she gripped both of my hips, digging her nails into my skin. Her mouth inched towards my rock-hard penis. I inhaled sharply as her lips grazed the base of my cock. An involuntary response to her subtle touch. 

Rather than - as I so desired - sliding it into her silky wet mouth, she teasingly slid her lips up and down the underside of my shaft, the warmth of her shallow breaths driving me crazy.

With an upwards glance and yet another smile, she kissed the tip of my circumcised penis, flicking her tongue over the sensitive knob, before getting back to her feet. She took a step back into the full flow of the shower, the water glistening on her skin as it cascaded over her body. She squeezed a large dollop of soap into her palm from the dispenser affixed to the wall. Seductively, she lathered it all over her body, moaning softly as she squeezed her large breasts and pinched her erect nipples.

I couldn't take it anymore; my hand gripped my throbbing knob, stroking up and down as I watched her erotic display.

Seemingly satisfied with her cleanliness, she submerged herself in the shower's jet once more, washing away the foamy coating.

Stepping out of the shower's stream once more, she sat down on the floor. With her back against the wall, she brought her knees in close to her body, before slowly and deliberately spreading them apart.

Her eyes flitted back and forth between my face and her legs, silently but forcefully urging me to watch her.

I willingly obliged, directing her gaze to the rock-hard cock in my hands as evidence of my reciprocal desire. 

I slowly stroked up and down my shaft, as I fixed my gaze on her sopping cunt. It seemed the more intense my stare, the more it turned her on. She slid a single digit over her clit, her eyes instantly rolling back at the slightest touch. The beautifully large lips of her pussy stuck to her inner thighs, displaying her inviting hole as it pulsated, opening and closing as if a living, breathing entity.

Moaning far too loudly for our setting, she plunged two fingers inside herself, thrusting in and out with ease as her natural lubricant seeped towards her bumhole. 

Knuckle deep inside her cunt with her left hand, her right found the engorged bud of her clitoris, strumming urgently as she curled her fingers up inside her.

My own masturbation sped up, my knob pulsating in my vice-like grip.

Her hands became a blur as she frigged and rubbed her pussy, her breathing ragged, her eyes disappearing into the back of her head. 

She was clearly on the verge of orgasm. I stepped forward and leaned over her naked body as I neared my own climax.

With a shudder and a drawn-out sigh, her pussy exploded. Her sexual juices squirted onto the tiled floor and splashed up onto my feet. 

Sensing my impending release, she crouched on her knees once again. 

This time there was no teasing. She pushed my hand aside and took a firm grip at the base of my prick, pumping the base of my shaft with one hand whilst squeezing my balls with the other.

My eyes momentarily closed as the pleasure threatened to overwhelm me. They opened just in time to see her "hawk tuah" over the end of my cock, her saliva providing sufficient lubrication to slide it down her throat.

She did exactly that, moving her hands away as she swallowed my entire length. Her nose pressed against my pubic area and her bottom lip touching my balls, I could feel my tip touching the back of her throat as she expertly suppressed any gag reflex.

She held my dick in her mouth for several seconds, before very slowly pulling her head back to release it, sucking in her cheeks to create a magical vortex as she did so. 

She repeated the action no more than three or four times before I couldn't hold back any longer. I groaned involuntarily - and far too loudly - as she slipped my cock out of her mouth and wrapped her hand around it once more. She stuck out her tongue as she aggressively pumped my prick. 

The first ropes of spunk flew past her waiting mouth and landed in her hair and across her face. Not wanting to miss out, she closed her lips over my knob, as she milked several more spurts of thick ejaculate into her mouth. 

Sucking every last drop from my wilting penis, she finally released me from her grasp.

In an act I'd only ever seen in porn films she opened her mouth, letting me see my cum balanced precariously on her tongue, before tipping her head back and swallowing it all.

Spent, my head spinning, the post-release, all-encompassing satisfaction coursing through me, I pulled her to her feet and kissed her passionately. 

I wrapped my hands around her and squeezed her buttocks, holding her tight enough to feel her nipples against my chest. 

She kissed me back with vigour. It was a sensual, sensitive moment which felt a little strange after such a primal sexual encounter. 

We both seemed to recognise this as we broke apart and grinned at each other once more.

We took turns to wash away the sweat and sexual release under the still-running shower. She went first, letting the water cascade over her, running her fingers through her hair to make sure every drop of my spunk had been removed.

Finally clean, she switched the water off, scooped her sopping clothes up off the floor and slowly opened the cubicle door.

Turning back to face me, she whispered "Wait a few minutes. If I don't come back, the coast is clear."

I nodded my understanding. She smiled at me a final time, yet with far more mischief and naughtiness than before - I assumed due to the experience we had just shared - before disappearing out of sight.

Several minutes passed, and she didn't return. Assuming that meant I was safe to leave, I turned to collect my clothes from the floor. 

The floor was empty. 

I checked the hook just outside the cubicle. Nothing.

Panic coursed through me as realisation hit; she'd not just taken her clothes, but mine as well. And there was no doubt in my mind that she had done so deliberately. That was the real reason for the added deviousness in her parting smile.

Even as the realisation that I was entirely fucked sunk in, I couldn't help but admire her audacity.