I found myself keep looking at the picture I had taken of my boyfriend naked FaceTiming the owner of the gyms wife Petra, and thought I have got to meet her to find out who she is, as he said it was the first time he had ever done it. So after a bit of investigation I found out what night Petra would be at the gym, and I went down to see, and I got changed and went into the gym.

Petra was slumped onto a bench breathing hard, her t - shirt sticking to her sweaty skin, and hair plastered to her face in strands, and she let out a heavy sigh. Then wiped her arm across her brow as her breathing began to slow again and looked around the half-lit gym, and saw only me on the exercise bike.

I looked back at her with her sweaty top clinging to her tits, with her nipples poking out, and her sweaty shorts clung to her thighs, showing off her cameltoe. Then Petra got up walked across the gym, and pushed through the gym's double doors, and headed for the changing rooms, so I followed and I could feel the heat and the wetness gathering at my pussy, and my legs trembling with every step, following the attractive woman.

Then she walked past the changing rooms and into the adjoining door, so I went into the changing rooms, stripped off and got into the showers, and I ran a hand over my tits, tugging briefly at my nipples. Then I ran my hand down across my pussy, relishing the feel, as I had it waxed the day before last, and it still felt good and silky smooth.

Then I dropped my hand lower, and with my index finger, I started touching the tiny nub of clit, sending little pulses of pleasure radiating outwards from my groin, and then I went lower, rubbing along my wet slit. My pussy lips parted instantly and my finger dipped inside, eliciting a low moan from way back in my throat.

The noise made me stop and look around the changing room biting at my lip, and here I was, stark fucking naked and fingering myself in the middle of the showers. And suddenly, the thought of being caught, naked and fingering herself, made me even wetter, and as I fingered my pussy, I started to wish someone would come in and catch me.

Then in walked Petra in her mid-twenties, dark brown hair, her tits were firm, and pointed straight at me and I couldn't help but stare. She had a slim body, flat tummy, and she too was shaved down below, her lips clearly visible, and she was staring right back at me fingering myself, with a smile on her lips.

Petra was even licking her lips as her eyes travelled down my body, slowly taking in her my tits with their hard nipples, my curvy hips, and then lower still to my waxed black pussy with my fingers in it, Her eyes seemed to stay there, taking in the view, before eventually coming back up to stare straight into my eyes, and said, laughing “ you look as though you’re having fun, can I join.”

Then she moved her hand until it was resting on my thigh, feeling my warm black and wet skin. Then inch by inch she crept her fingers inwards and upwards, until her fingertips rested on my shaved mound, just above my slit. I could feel my clit aching to be touched, but didn't want to scare Petra away. She was looking flushed and with every rapid breath she took, her tits were rising and falling, rising and falling.

Petra’s fingers inched down again, this time brushing ever so lightly over my clit, making me gasp, before reaching my pussy where they slid inside in one push. I could feel my orgasm already building inside me, as Petra was staring intently at her fingers as they slipped slowly in and out of my wet pussy as if they had a mind of their own, and I orgasmed shaking from head to foot.

So I reached up with my own hand and was cupping her left tit, my thumb lightly moving over the nipple. Then my other hand went down to her bald pussy, and I slipped in one finger, then I made it two, then three fingers pushing inside her, starting to pick up the pace, her low moans getting louder, oblivious to her surroundings except for me naked before her, who was even now pulling at her nipple and fingering her pussy between her legs.

Petra leaned forward and pushed her firm tits into my larger ones, and I felt our nipples come together, rubbing, and then Petra pushed her shaved pussy onto my fingers. And her hands slipping down my back until they were cupping my ass cheeks, so I moved her own spare hand down to feel her tight ass.

Then Petra’s hand probed round and cupped my wet pussy, and then her thin finger, then two, tentatively pushed against my pussy lips, then slipped inside with no resistance, and Petra started cummin and cummin hard, squeezing her pussy against my fingers which were pumping in and out of her pussy.

Petra then pushed in two more fingers in one movement, and her thumb flicking at my clit. "Oh god..." I moaned "Oh god yes, you're going to make me cum." ……"Yes," Petra answered, "Yes cum for me you little slut. Cum for the stranger whose fingering you in the fucking showers..."

And then I was screaming as my orgasm hit, and I bucked my hips, impaling myself onto her fingers, and pushing my tits into hers, and biting at my lip trying to stifle the noise I was making. Petra was still riding her own pre orgasmic pleasure though and needed more, so I fingered her faster while thumbing her clit, then she moaned, " I’m going to cum, watch me cum, watch me squirt all over your hand.”

And she did - and I stared hard, watching intently as her orgasm rolled over in increasing waves, making her squirt all over my hand and stumble and moan, with her eyes rolling. After what seemed like ages the intense pleasure melted away and died into a pleasing orgasmic afterglow, and Petra finally managed to open her eyes, and Petra said, “ thanks that was incredible, hope you enjoyed it as much as me,” to which I nodded yes.

Then I explained to Petra who I was and showed her the picture on my phone of my naked boyfriend FaceTiming her, and she apologised and said, “ honestly nothing has happened between us, we were just having a laugh.” I assured her it wasn’t a problem and everything was alright, and after a brief chat I left, and when I got home I had great pleasure in telling my boyfriend I’d had what he couldn’t.