My, that was awfully close now, wasn't it? I would bet you were just a few strokes short of making a big mess all over your office floor.
You okay there? Your balls look like they've gotten a little swollen. Even your cock is still throbbing.
Want to stop and get back to work, or are you ready to keep going? Sure your cock might be sore and your balls a little swollen, but I bet they can take a little more.
Keep going at it and I might want to get a little bit of attention by something other than your eyes.