I never dreamed I'd be one of those people who have a sexual relationship with a co-worker. Mostly that's because I'm happily married and have been for more than twenty years. A second reason is I've always felt that having relationships at work is wrong. It isn't that I haven't given some of the females where I work some thought. I've spent some daydreaming time having fantasies about a few of my female colleagues. The third reason is I have friendships with quite a few of my female coworkers and have never wanted to mess up those friendships. I've seen sex screw up too many perfectly good friendships.nnThen last Thursday evening something happened that blew everything I believe about sexual relationships at work right out of the water.nnI was in my office quite a bit after my normal quitting time last Thursday evening, so late it was dark by the time I finally got my things together and got ready to leave. I'd already called my wife and told her I'd be late, not that it was going to mess up any of plans since she already had a meeting scheduled for that night.nnAs I was locking my office I noticed that the lights were on in an office down the hall from mine. That was unusual because I'm almost always the last one to leave. The still-lit office belonged to a female coworker named Terry. OK, she is one of the women I've harbored an occasional fantasy about, in case you were wondering. Since she usually is out of the building long before I am, I thought I'd check and see if anything was wrong.nnI've known Terry since my company assigned me to this particular office complex about three years ago. She's in her early forties, is divorced, and has a couple of teenaged kids. She's quite attractive, with frosted hair she wears layered and cut just a bit lower than her ears. She's also slim, but that doesn't mean she's shapeless. Her breasts are small - I think they're exactly the right size for her - and she has a small, firm, extremely well formed bottom.