I (24 F) have a coworker (27 M) who has been flirty with me since I started my position. It started off as harmless compliments and comments, but it gradually escalated to the point where whenever we are alone we tend to be making dirty jokes and flirting heavily. It was a slow day, with most people out of our admittedly small group not being in due to it being the Monday after a Holiday, and my boss even had to leave halfway through the day for an appointment, leaving just the two of us left in the office. As is usual for us, we started flirting and teasing each other, just having fun, until he said “if you weren’t wearing that ring I’d bend you over (boss)’s desk and show you what you were missing out on”. I was already in the mood by this point so I slipped the ring off of my finger and said “what now?” He got closer and put his hand over mine, and I put mine on his leg which emboldened him very quickly. We started making out, and I let him get his hands under my blouse to undo my bra before I asked him “weren’t you saying something about (boss)’s desk?”. He laughed and led me into the office where he pulled his cock out for me to suck. He was pretty big and I had a bit of trouble getting him all the way down but I managed it! When he was ready, he got me back up to my feet, bent me over the desk, pulled my leggings and panties down and slid into me. The combination of what I was doing, where I was doing it, and who was doing it to me were all great and I came a couple of times while he was fucking me there. Eventually he pulled out, came in my mouth, and had me swallow like a good girl. We got cleaned up, joked a bit more, and then I went home for the day. I really hope tomorrow isn’t awkward.