When she returned from the restroom, I noticed she didn't have her pantyhose on anymore. I just thought that was odd, and tried to maneuver my erection into a less painful position as she talked to the lady at the typewriter. Karen then returned to my office with something in her hand. She motioned for me to stand, then turned her back to me. She held up the stopwatch with her right hand, bent over at the waist, pulling up her dress to reveal a very wet bare pussy, and said in a loud voice for me and the lady around the corner "You have five minutes. You can start now!"
The typewriter started clattering as I yanked my prick out. As I began to try and ease it into her, Karen grabbed her lower legs and rammed herself back against me, impaling herself, and damn near knocking us both over. Rising to the occasion through the fog of surprise, I grabbed her hips and began to slam into her, hoping that I might last two of those five minutes at that pace! Her pussy was so incredibly hot, and I was beginning to understand what was going on. The thrill of possibly being discovered had her in near-meltdown mode. She started moaning, quietly at first, then louder, "ummmmm, uuunnnhh...OOOOH!", until I was concerned she was going to be heard over the sounds coming from the typewriter. Sweat started to pour from my forehead as I wondered what to do. I leaned over her, and covered her mouth with my hand. She looked back at me and held up the stopwatch. I could see I still had 3 and a half minutes to go. Then she bit down on my hand!
"AACK!" I exclaimed. The typewriter stopped just as Karen slammed into me and reached back with one hand, grabbing my ass and holding me still, deep inside her. She gyrated once, then again on my rock hard member, then the typewriter started its stuttering tattoo again. I slammed into her again with a vengeance, her steaming wetness greedily slurping at my prick, the sweat dripping in my eyes almost blinding me. I still held my hand over her mouth, twisting her head back at an awkward angle as she keened into my fist, looking back over her shoulder at me with glazed eyes. Her sounds grew more insistent, less rhythmic, and she started spasming into me as her orgasm began.
I thought I was King of the Universe there for that second, then my tightening balls began to unleash a torrent of hot seed that flooded her already drenched pussy. We pounded each other a few more times, slowing as our moment receded. With a final pull, I gripped her lovely hips and slammed her into me, releasing her mouth with my hand, and held her still while I shot the last spurts into her. The sweat poured off me. My shirt was soaked, and I could feel a drip working down the middle of my back as I stood up. Karen nonchalantly stood upright, looked back at me and winked, then hit the stopwatch. "Time's Up!" she said.
She stepped to the door as the typist finished and started pulling the paper out of the typewriter. I looked down at my pants. The front was soaked around the open zipper with our fluids, and there were droplets all down the legs as well. I heard a tap as Karen rapped on the door, then moved her side up against the doorway and pulled the rear of her dress up to reveal the fruits of our passion running out of her and down the insides of both legs. She turned her head back to me, winked once again, then turned and walked around the corner as I heard her say to the lady, "OK, let's see how YOU did."