The office fuck SeXStoRY

This happened in a regular summer day at lunch time while I was working at the office: I was finishing my lunch and going to the 11º floor (thats were I work) I had already a huge boner because of my workmate Sabrina (she is really hot). Then I spent some boring hours working but a while later i looked at the building across the street and i saw a guy in his office fucking some girl (probably his secretary) against the huge glass that surrounds the building, then i started jerking off and Suddenly Sabrina entered my office, without knocking at the door and caught me with my hand on my dick and cum on the desk. I didn´t know what to do but she did, she got closer and went under the desk then she sucked my dick, and then we fucked against the wall until we were exausted.