I work in a small office building with 4 other people. We each have our own offices, and rotate who stays for lunch. This allows for a bit of additional privacy every week. One week, the wife decided to stop in to keep me company while everyone else was away.
She arrives and I greet her at the main door. We kiss deeply, and I take her back to my office where she sits me down in my comfy chair, and starts undoing my pants. The belt comes apart fairly easily, then the button gets undone. She looks me in the eyes lustily as she brings my zipper all the way down. Once my pants are open, she fishes out my already erect cock, biting her lower lip seductively when she sees it.