Having her in her office cubicle.

I fukced her on her office table. Damn it was hot. Couldn't climax though - security rushed hearing noises and we both were escorted out. She was all horny and she was damn blushing. We thought of the restroom and the janitors room but both were smelly and small until I noticed her floor almost empty. 2 or 3 were there at their cibicles but a bit far away from hers so we thought it was fine and the adrenaline we both had drove us to take the risk. She bend down to her desk while I entered her through the back. Holded her skirt up and tight but I couldnt hold my urge so slided my both palms onto her boobs, unhooking her bra and top. She was nude already and I guess someone heard us, the next instant the security was right at the back of us ordering to stop and leave the building immedeately.
We fukced later in the car but her cubicle was way better.