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Sonia is quite a funny, wild character: she's a lesbian, member of a motorcycle club, loves wearing leather, sports several large tattoos. She used to be a female bodybuilder but a bike accident messed with her hip so she quit, but retained some of her big build. She's somewhat short, a bit overweight, stout, powerful. We have been friends for a while and she's always been dependable and trustworthy, even if rather irky and short-tempered.
There was always a good vibe between us, to the point she one day confessed she found me attractive, in spite of the fact she prefers women. I quickly suggested we could have some fun and mentioned my sexfighting fetish. She readily found it fun and agreed we could soon have a go. We met some days later at a dilapidated place she used to store spare bike parts at and covered two big mattresses with a plastic sheet to wrestle in oil. Whoever gets his or her opponent to cum is the winner. We started naked on our knees, arms opened and going for the mutual embrace. We rolled around and over each other for a while, slipping and sliding in the oil. I was very hard and could tell she was very wet.
We fought to a stalemate, she wouldn't let me penetrate her and as we were tightly locked in a mutual rolling bearhug she couldn't use her hands to work on me, so it soon became clear we had to change tactics to find the winner. We got ourselves into a 69 position and used our tongues to stimulate each other while grabbing each other's glutes. As this phase was also stretching out without a clear result, I voiced we could use some good old penetration to see who could walk out victorious. She agreed and soon I was on top but the oil was very slippery and Sonia managed to roll me off and underneath her and started to rock her pussy and as a result my hard cock was almost immobilised by both her solid weight and her knowledgeable sexual movements. My clĂmax was approaching fast while she was keeping her cool. I could hold myself for about two minutes, then my cock exploded with pleasure as I moaned bitterly and Sonia's grin widened. I had been thoroughly defeated this time. Sonia sat on my vanquished chest and raised her arms and made me lick her until she came, then we showered together and had another sex round, this time no sexfighting. She agreed to a rematch. I will have my revenge soon.