The following week passed in a haze with a whirlwind of thoughts filling my mind.

Would my new friend in the building across from me repeat her performance?

Did she really want me to take the lead this week?

Could I really expose myself in such a public, intimate way?

My wife could not help but notice a difference in my behavior. Several times she asked me what was bothering me. She often caught me with a far-away look in my eyes as I pondered what might occur this coming Friday or what it might potentially morph into. I continually brushed it all off as a symptom of my stress and the increased workload I was currently facing at the office.

While at work, I would often look out my window into the office across from me to see if I could catch a glimpse of my mystery woman. I saw other people, both men and women, in that office, but never her.

I masturbated several times during the week, replaying the erotic scene over and over in my mind as I did. My wife was also the beneficiary of several good, hard fuckings as well, which she enjoyed immensely. Unfortunately, it wasn't her I was picturing in my head as we fucked.

When Friday finally rolled around, I was still not sure what I would do. I was definitely going to stay late to see if my new friend in the other office would show. What I wasn't sure about was whether I would perform for her as she had requested. I had never considered myself an exhibitionist and had never performed any sex acts in public view before.

As the workday drew to a close, the rest of my colleagues left for the weekend. I stayed behind and was soon the only one left in my office.

I looked out my window as the darkness began to settle outside. One by one, the lights in the building across from me went off as their occupants retreated for the evening to begin their weekend. Soon all the offices were dark, even the one that had been occupied last Friday with my mystery woman.

"Hmmm," I thought to myself. "Maybe last week was just a one-time event I was lucky enough to catch."

As my thoughts returned to what had taken place exactly one week ago, my cock began to stir in my pants as I recalled how my mystery woman had pleasured herself for my viewing enjoyment. My cock continued to harden within my trousers as I recalled the beautiful lingerie she had displayed for me as she touched herself.

Without thinking, I unbuckled my belt, unfastened the button on my pants, and lowered my zipper. As I kicked off my shoes, I lifted my ass from my chair and shoved my pants and boxers down my legs, dropping them onto the floor.

Still in my dress shirt and tie, I wrapped my hand around my shaft and slowly started to stroke myself as I recalled last week's scene again in my head. I was now oblivious to my surroundings. I no longer cared that the lights were still on in my office. There were no lights on in the offices across from me, so I figured no one would see me.

My mind replayed what I had seen last week on what seemed like an endless loop. Her beautiful red hair in a loose ponytail. Her incredible tits as she played with her stiff nipples. The sexy garter belt framing her hand moving within her panties.

I reached my other hand down and lightly caressed my balls as I continued to slowly stroke my now rock-hard shaft. Speeding up and then slowing down, enjoying the exquisite edging, not wanting to cum too quickly.

I imagined her watching me as I pleasured myself.

"Would she get as turned on watching me as I had her last week?" I thought to myself. "Would she join in on the fun?"

Reaching up, I loosened my tie and unbuttoned my shirt. Once open, I slid my fingers over my nipples as she had done last week. An added jolt of pleasure coursed through my body as I did.

My hand sped up as I thought again about how she had cum for me last week, her body arching with her climax.

A light sheen of sweat now coated my body. My breath started to get ragged as I chased my own release, no longer caring who might, or might not, be watching. I was long past the point of worrying about that now.

I felt my orgasm approaching, so I slowed myself down again, squeezing my shaft lightly to prolong the sensations. My mind's eye moved from replaying the action from last week to a nasty, new fantasy of my mystery woman joining me in my office, bent over my desk as I slid my cock into her warm and willing pussy.

It no longer mattered that I was a married man. My thoughts were now fully focused on my mystery woman.

The pace of my stroking increased with this change in fantasy. My shaft was slick with the precum that was now leaking profusely from the tip of my dick. This just added to my enjoyment as it helped lubricate my cock as my hand slid up and down my shaft with increasing speed. I was close now, so very close.

I lifted from my seat and cried out as I came. Rope after rope of my cum shot out, splashing on the floor and against the window in front of me. My whole body shuddered as I rode out one of the most incredibly intense orgasms of my life.

It took several moments for the sensations to subside. I slowly continued to stroke my cock, milking the last drops of semen out of me. I shook my head to clear the cobwebs.

At that moment, the light in the office across from me went on. There was my mystery woman standing, looking at me. Her face was visibly flushed, and her blouse was unbuttoned, exposing her pink bra. Her skirt was again hiked up to her waist. A clear wet spot stained the front of her matching pink panties.

She smiled and started slowly clapping her hands. My mystery woman had been watching after all and had obviously enjoyed what she had seen.

I stood and bowed to her, still naked from the waist down. My now flaccid cock dangling between my legs.

She started to pull her clothing back into place. As she did, for the first time, I noticed the light reflecting on the ring on her finger. She was married, just like me, enjoying a little harmless fun with the married man in the office across from her.

Once she was presentable again, she turned back to me, still smiling, and locked her eyes with mine. She then mouthed the words, "See you next week."

With that, she turned to the door, and the lights went out in her office.

I chuckled to myself as I cleaned up and dressed again. Exhibitionism had never really crossed my mind before today. Now that I had experienced it and enjoyed it immensely, it seemed I would have plenty of opportunities to practice my new kink with my friend in the weeks and months to come.

Working late on Fridays wouldn't be too bad anymore.