Quoting: PossibleCuck
He knows she is married and is still interested in her. I have bever met the guy and she does not want me to.
If he knows she is married and that hasn't put him off, then that sounds like he is just looking for a casual fling, which of course will suit your requirements perfectly.
I also think it is good that you don't know the guy and never meet him. I don't suppose it would bother him if he were to met you, but you might find it best not to know what he looks like. If your wife ends up having sex with this guy and ends up carrying his baby, you may start picturing them in bed together. You might be better not being able to put a face to this guy's name. I found this an advantage with my wife. All I knew about the young guy she slept with was his Christian name and age. The least you know the better.
I am also assuming that this guy is just being used by your wife as a sperm donor, so once he has made her pregnant she will dump him and he will never know that she is carrying his baby. Will she still be at college when she is pregnant? He may wonder if it's his.
I can see where Wally8861 is coming from, but in this case I think you are just going to have to take a chance and go with the unsuspecting guy your wife has selected.
Peter C