DISCLAIMER - At the time of writing we were all consenting adults over the age of 18.
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A Triathlon is a non-stop swim, ride and run event that is all about pushing one's limits - otherwise you don't finish.
I'm Will; (180cm high, and a lean rangy 90kg body) and I compete regularly in all 3 categories (short, medium & long course) as part of my preparation for Ironman qualification. (1 mile swim, 100mile bike, followed by a 26 mile marathon to finish.)
Aside from the varying range of competitor's athletic bodies, that reflect their level of fitness and endurance; there are also a certain number of very attractive male & female spectators; who also quite openly ogle the lean fit lycra-clad bodies mingling around the finish line after an event - and provide an avenue for competitors to release pent up sexual tension.
During the bike-leg in a previous event I had come up behind a very attractive lycra-clad female backside ahead of me; that caused me quite a bit of discomfort as I fantasised about possible after-race outcomes.
We shared a brief greeting before I pulled ahead.
After the event I caught up with Kim; and found out that she was a single mum who had gotten into the sport to help get her pre-pregnancy body back. I complimented her on her tight body She was impressed with my Ironman goal. When she found out that we lived reasonably close to each other, she raised the possibility of training together.
We'd had a couple of "getting to know you" swim, bike and coffee afterwards sessions; during which I had openly admitted that my initial attraction had been sparked by the sight of her sweat-dampened backside as I came up behind her on the bike leg. She in turn said that she had become increasingly interested the way the bulge in my bike shorts changed shape.
We both admitted that we were not looking for a relationship; but were not averse to having sex on a regular basis.
So; we had met at a local vegetarian/vegan restaurant last Friday night preparatory to coming back to my place to consummate our 'friendship'.
The consummation was a physical event in which we virtually ripped each other's clothes off the moment we walked through the door; before orally checked each other's bodies out, preparatory to repeated pressure-testing of her pelvic flooring, and associated musculature in a wide variety of different positions.
The last thing I remember was snuggling up together after we had both collapsed.
I got nudged awake around 6AM to see her on her knees and elbows beside me; legs spread, waving a wet pussy in the air and being told... "WAKE UP!! I need to be FUCKED before I go home!"
"Grab hold of my hips; shove that beautiful big fat cock in me as far as is will go, and pound my pussy like there is no tomorrow, until I feel you emptying your balls inside me!"
I was instantly awake; with my cock standing to attention.
I did just that! I grabbed hold of her hips; slid the head of my cock just inside the entrance to her very wet pussy - and rammed it in until I hit her cervix.
She shrieked! I groaned!
So, I paused momentarily; then withdrew most of the way back out, before ramming it back in again.
"FUUUUUUUUUUUUCK!"
"DON'T STOP!!"
"FASTER!"
This was no longer a passive fuck! The thought that we may wake the entire neighbourhood never occurred to us. We attacked each other like there was no tomorrow.
She yowled like crazy when I came and smothered me with kisses when I collapsed onto the bed beside her.
A short while later she was up, dressed and out the door; with the promise to 'be in touch".
I got up and, because of the time, headed over to the local pool to do 10Km in their 50M outdoor pool, before hitting the books and bringing all my work up-to-date