Jerking in Office

This happened last week when I was in the office.

I share an office with three other girls. One sits beside me and two sit opposite me with a desk divider about 2 foot in front of me. Last week, the girl sitting beside me was off and I was day dreaming and getting horny. Usually I sneak off to the toilets for a quick session however since I was at my desk, I thought I would see how far I could risk jerking off at my desk. The girl opposite is in her twenties, pretty cute and the subject of many a jerk off session in the toilets. The desk divider is just high enough to see the top of her forehead and if I sit up a little I can see most of her face. She was busy on the phone so I started to rub my cock through my trousers. I was getting hard and I could feel the top of my cock getting nicely slippy so I eased down the zip and got a good stroke going. Pretty soon I was ready to pop dreaming about shooting my load over my co-workers face when she looked up and started a conversation. I was too close to stop so carried on jerking whilst keeping the conversation going. After a minute I could feel my orgasm rising and face flushing as I shot my load into my other hand. She didn't notice a thing so I put my head down briefly and gobbled up my huge load from my hand. I continued to talk to her with a mouthful of my own cum with the rest dripping on the floor between my feet. I saw her today and walked around with a huge bulge in my pants thinking about what I got up to.