I will call her Angel. She started with us about a year ago. 20 years old, determined, qualified, self confident, she was always going to be an asset. The fact that she was 48kg, 160cm foot tall and sexy as hell didn't escape my notice either. She was a really nice and straightforward person, and we had a great working relationship. She was a little flirty and I reciprocated, but it was all above board. I mean, she was a good 20 years younger than me.
Our business is fairly small, just 15 people or so in a tiny office and so everyone knew each other pretty well. Young developers mainly, and only 2 women in the lot. No office romances either, as both Angel and her workmate were with long-term boyfriends. We all had great Christmas shows, got drunk together, had Friday night drinks regularly and just really enjoyed working together.
We all work some really odd hours, and work from home quite often. It was not unusual to see the office lights on at midnight as we tried to meet unrealistic deadlines. On this particular night I had to rebuild a server and so had to pop in after hours. I went home for dinner and came back in at about 9pm, looking forward to catching up on my porn viewing while the install was progressing. I drove up and parked in the street, noticing that the upstairs lights (where our office was) were on. I had a whole lot of cables and stuff that I had to drop in the server room so I came up the back stairs. I am the only one with the back door over-ride key, just in case the security system at the front goes on the fritz (which has happened before). I clumped up the concrete stairwell and fished round in my pockets for the key. I managed to wave the magnetic key and pull the heavy door open without dropping anything and wedged my foot in the opening. I flicked it open and slid in, catching it with my back before it slammed. The lock is a bit temperamental so you have to be a bit careful. In this case I was extremely happy that I did.
There is a tall partition wall separating the doorway from the main office area, and I could hear noises that I recognised all too well. "Dark Desires" was the name of it, and it features a rather hot scene of a woman getting royally screwed in various positions on a black leather couch. Fairly long session (as these things go) and one of my personal favourites. I wondered who was watching it (thinking it was the other part owner) and I gently lowered all the bits and pieces to the carpet so I could sneak up and stick my head around the corner. What I saw had me gobsmacked. The computer screen was facing me, the scene I remembered so well playing out in front of me. In the leather chair facing it though (with her back to me) was a very rapt Angel. I couldn't believe it, this sweet (and I thought innocent) young woman watching a very energetic sex scene in glorious color and stereo sound. I was stunned for a moment, and that was when I noticed the chair. It was moving back and forward ever so slightly but in time to the bouncing woman on the screen, and it was then that I realised that my Angel had her fingers on (or in) her sweet little pussy.