As my next break was some hours away I realised my post was rather remote and no one seemed to be around so gratefully I leaned back on the bench and ...xtracted my stiffie from my underpants and began to stroke it vigorously, my eyes closed in concentration as I focused on the last juicy pussy I,d sampled just a few weeks prior. My ejaculation was refreshing and a heavy one. “Ahem Young Man! Heavy Shot You Just Did Didn,t You?” A familiar voice interrupted my reverie and with a sinking heart I. Quickly, I slipped back under the bed sheets and turned toward the window, pretending to sleep. Moments later, I could hear Derek emerge from the bathroom.They exchanged words, and I could hear the shower running again. I could feel my heartbeat throbbing against the mattress and I had great trouble controlling my breathing. With my eyes shut tight, I listened intently for any sign that Derek might have discovered what happened. Did the room smell of sex? Did he smell my cum on her breath? I. We'd been working our butts off for the last couple of weeks preparing for stock take, it was all very boring, and very tiring. When at last it was all over and done with, we decided to go into town for a big blow out. It was Saturday night and we were going to drink, dance and relax. Getting ready at my place, we shared make up and did each others hair, we had a few drinks and danced about my bedroom as we chose our outfits. She chose a short white skirt, meaning a very flimsy white g-string. "Come on, this way!" As we ascended the staircase I couldn't help but feel like I was being watched and my heart beat seemed to increase exponentially as a result. She led me up to the third floor where there was a corridor stretching to the back of the building. There were rooms on either side of the corridor identified by the rows of doors along the wall each of which was open except for one. That was the one she took me to.She stopped before opening it and turned to face me."I'm going to.