Right. Accidents happen but slurping up his cum and swallowing it bit by bit is the least you can do. If watching you do this turns him on maybe you can get it all in one shot the second time.
Sometimes it hits the back of your throat and makes you cough unexpectedly. WHEN that happens i'll be sure to clean it up like he did. That was a heavy thick load.
Once I start, unless it's a uniformed cop walking past the car, I'm not stopping. I don't care if you watch. In fact, maybe you'd like to join in or have me visit your car. Lots of truckers like to stand around & watch.