"What about..." I tried to protest, but she cut me off.
"Be quiet, or we'll get caught," she insisted.
She pulled me into a stairwell, and we quickly went down one level. We moved purposefully without looking like we were in a hurry as we moved to the far end of a long, darkened hallway. We entered another stairwell and raced up two levels. She checked that the coast was clear, and we moved down to the fourth door.
She produced a key, and suddenly, we were inside a dark office. She left the lights off and checked that the door was locked, then led the way from a receptionist's area to the office beyond. There was a large desk with windows behind it. Blinds blocked the view.
She pulled the front of her strapless dress down to reveal her breasts, and she quickly moved to kneel in front of me.
"We don't have much time," she reminded me, "so we're going to have to do this with our clothes on. We really must hurry."
While she spoke, she opened my pants and pulled them down to my thighs. The dress pants were tight under my tuxedo jacket, so there was little risk that they would fall further.
My cock was more than half-hard and rising. She purred as she rubbed it against her breasts, and then drew it between her lips as she sucked and licked to get me fully hard.
The vixen wasn't wearing panties, so when she pulled the back of her dress up and bent forward over the small table below the window, I was able to step behind her and plunge right in. She said to hurry, so there was no time for niceties. I plowed into her hard and fast.