This took place on a week night while my then girlfriend was working late. Her office was in the heart of the city on one of the upper floors in a high-rise. A large open plan space with chest high cubicle walls for each workstation. It was not uncommon for staff, security and cleaners to stop by the office at random times during the night.
To show her appreciation for me waiting on her, she slipped my cock out and began to suck me off while still seated in her chair right in her cubicle. Both being daring deviants, we undressed completely and moved to her bosses office. I sat her on his table and began to fuck the shit out of her. The fact that she despised him made it all the more special. I turned her over, pushed her face down into the table and continued to fuck her from behind. Cum was dripping all over the carpet floor where her bosses feet would normally be. I stopped thrusting for a moment when we saw a security guard doing rounds outside the reception area. I did not pull out. When the coast was clear I contunued fucking her and ended up offloading in her mouth. She swallowed. No mess.