My first wife and I used to share an office. We could lock the door and be reasonably sure no one would walk in on us, especially if we were in the inner office, with a second locked door.
My wife varied widely from day to day in terms of how affectionate she was, at work. On “all business days,” when she was preoccupied with a tough assignment, I knew better than to even try to hug her.
But on days when she was feeling more frisky, we had some memorable times. On one such, I heard her lock the outer door, then she came in to my office, and asked if we could lock the door to that one, too.
Five minutes later, she was completely naked in the center of the office, but had kept me mostly dressed... just with my pants open and my cock out, though my slacks did slip down when she reached inside, to hold my hips.
We ended up fucking with her in cowgirl, me seated at my desk, and then with her taking it from behind, bent over my desk. Her being totally without clothes in that florescent-lit business setting got us both very excited.
When she started climaxing, I had my hands cupping her breasts, but she moved one to her mouth. Sound-proofing. I actually wondered whether the slap-slap might give us away, but the walls were probably too thick for that. I ended up cumming so hard that it dribbled out of her and onto the carpet.
We were both sweaty at the end, and she asked me to help mop her off (paper towels!) before she hastily dressed (I think once the excitement was coming down, she felt pretty vulnerable, even given the locks. We knew we weren't the only ones with keys to those offices.) And I got the clean-up detail, generally. But it was worth it.
She gave me a hug before getting back to work, and the encore in bed that night was also memorable.