The missionary position.

"Me on top," I suggested. If we had more time I would have wanted to try the more kinkier positions we had done during our swinging days so the old standby missionary position would do the job.

She grabbed a pillow to place under her butt and spread her long legs to welcome me to her dripping wet snatch as I climbed up on the bed. There would be no foreplay, just unadulterated sex.

"Make love to me, Michael," Emma whispered when I knelt between her thighs.

I paused just as I was about to slip the tip of my cock between the folds of her pussy lips.

She noted my hesitation and smiled. "We're not having an affair. Our spouses agreed to this -- the four of us fucked last night, remember? Sam wants us to conceive a baby through love and not emotionless sex."

I nodded and, brushing aside any lingering doubts of what we were doing, slid my cock into the warm depth of her pussy. She pulled me down to kiss me passionately, moaning in my mouth as I accelerated my thrusts. After a couple minutes Emma broke our kiss so she could cry out as she started to climax.

That excited me, causing me to pound her faster. She dug her nails into my back and I responded by jamming my cock harder into her tight spasming cunt. She moaned with the rhythm of my balls loudly slapping her upturn ass. It was a climatic battle of the erotic senses I knew I was going to lose but gladly accepted my fate.

"Oooooh God!" she screamed.

I silenced her with a fierce kiss as the first of many jets of semen splatter the walls of her womb.

She hugged tightly as my thrusts slowed to a halt and we both came down from our orgasmic bliss.

"Thank you, Michael," she smiled at me.

"Not until you test positive," I repeated our running joke.

"We should go," she whispered, giving me a kiss. I reluctantly pulled out and off of her. She continue to lay on the bed while I got dressed. I guess she wanted to make sure none of my semen leaked out.

"Would you like to do this again tomorrow?" she asked as she slipped her summer dress on.

"Sure," I answered without hesitation.

"Good because I already booked this room for the week," she laughed.

I drove her back to her store and she just said a quick goodbye. Understandable no kiss since we weren't baby making any more and she did not want her employees thinking she was having an affair. When I got back to my office, I rushed back to my desk before my coworkers leisurely got back from their lunch.

"How was your lunch?" Steve asked, not suspecting anything.

"Busy," I answered with my best poker face. Needless to say, I was no longer anxious or frustrated the rest of my day at the office.