I was a 35 year old manager in an engineering company, and had been working at this company for less than a year. As we handled projects worldwide I often had to work late.
This particular day, I was in my office after hours. My secretary, who was about 5 years younger than I and whose desk was just outside my office, was waiting for her husband. He worked in a different department in the same company. He also had to work late frequently and they drove in together, so when he worked late, she sat at her desk and busied herself with minor tasks.
I had a nice, office-informal relationship with her. We would talk about our respective families, or about other people in our office, or the day's events - regular office chitchat.
As I reviewed reports from our overseas customer, the door to my office opened and my secretary entered. I said hello and asked what she wanted. I was a bit taken aback when she closed my door and without uttering a word, leaned down, put her arms around me (I was still seated) and gave me a long, passionate kiss. I was astonished as she had never before indicated in any way a romantic interest in me.
As she continued kissing and tongue game me, she reached down, undid my belt and unzipped my fly. All this while she had not uttered a word to me. I clumsily asked what she was doing, but she reached into my pants and pulled out my cock! As you might imagine, I became quite hard but I didn't know what to say or do as she leaned down and took my chick in her mouth. I just sat there as she sucked me.
After several minutes of her sucking me, I told her that I was going to cum and tried to pull out of her mouth, but she held on to me and wouldn't let me withdraw. As I came in her mouth, she let out a little squal of pleasure.
After I finished, she grabbed a tissue and spit my cum into it (she apparently didn't like to swallow).
As I sat there, she got up and went back to her desk to await her husband.
I clumsily put myself back together and just sat there, dumbfounded by what had just happened between us.
The next day I took her out to lunch and we talked about what had happened. She told me she was turned on by my intelligence and how I handled myself in the office.
We became good friends and frequently thereafter went out to "lunch" together that included special "desserts".
We still exchange messages to this day, though I am retired now and living in another state.
That was a day I will never forget!