I love watching other guys fuck my wife and have been watching her for over 20 years. I learned early on to NOT cum until the end. I too lose interest after I cum. Just wait until everyone else is finished and you will remain interested the entire time.
As for her fucking a guy she works with, I think it is great. I like it when Kate fucks guys we encounter in our everyday life. My wife has fucked guys she works with, she fucked a guy who worked for me, I hired a black guy who had been fucking my wife for a couple of years, she fucks her boss and she has fucked several of my married buddies. I love it.
Rob
Feel free to contact me directly at robandkate@hotmail.com