They fucked their wives from behind.

Bill reluctantly pulled out of my wife's snatch and his white spunk oozed out. Emma unhooked her legs from my shoulders and wrapped them around my waist, preventing me from pulling out until she felt her pussy sucked the last amount of jizz from my balls.

"Ready for more?" Sam asked, glancing at Bill's stone-hard cock quickly before looking at Emma.

"I am," her friend grinned as both women stared at my erection when I finally pulled out, slick with pussy juices.

"Me too," I said. "Do you girls mind rolling over?" Sam's belly was still small enough she could still enjoy doggy style.

"Want to play the game from the good ol' days, huh?" Bill joked while our wives got onto their hands and knees.

"Sure," I answered as I nudged the tip of my cock into his wife's cunt.

During our wife swapping days, we had created a game where Bill and I would try to make each other's wife cum as many times as possible without cumming ourselves. The girls would in turn try to make us cum as soon as possible. We called the game "Greyhound" because we took the girls doggy-style and raced to make each other cum. Needless to say there were no losers in that game.

Emma slammed her ass back against my accelerating thrusts.

Bill kneaded my wife's butt as he watched his cock piston in and out of her pussy.

I reached down and cupped Emma's huge tits, tweaking her nipples with my index fingers and thumbs. She mewled as she started to climax.

Perturbed that I was in the lead, Bill reached around and twiddled Sam's clit, causing her to cry out ecstatically.

"Two," Bill grunted as he continued to pound my wife from behind as she shivered from her second orgasm.

"Two... no, three," Emma groaned as her cunt convulsed around my cock from one orgasm to the next.

That spurred Bill to thrust faster and faster, causing Sam to cry out as he brought her to a third orgasm.

"Fuuuuck!" I roared, unable to last any longer and emptied my balls into Emma's unprotected and hopefully fertile womb. I couldn't get too upset on losing.

Having "won" the game Bill didn't see any reason to hold back any longer. With a few more hard thrusts, Bill grinned and came while Sam shivered with her forth orgasm.

Our wives had big happy grins on their beautiful faces as deflated cocks slipped out of their reddened twats. Like I said, there were no losers in the game -- Sam got to be fucked by Bill and Emma got to be filled up with my seed.

"I guess we're done for tonight," I noted the obvious.

"Yeah," Emma sighed in disappointment. I'm sure if she had her way we would be fucking into the morning but we all had work tomorrow.

"Tomorrow at the same time?" Bill grinned.

Samantha looked at her best friend then to me. Even though we had agreed that I would fuck Emma for the week we had thought Bill fucking my wife was an one time thing. I guess there was a miscommunication.

"Sure," I replied.

"How about coming to our place dinner?" Emma offered.

"That would be great," Sam smiled. My wife and I threw on robes to see our friends off at the front door. While I waved at them backing out of the driveway I wondered if the hidden security cameras in the bedroom caught all of the action.