I couldn't agree more ... ones wife has just got to be comfortable with the situation if you're going to succeed in getting her to take on some strange cock! Especially so if it's her first time taking on some strange cock and it happens to be black cock! I know that in our situation anyway, it would have had never happened had Edwin not been a friend of mine! Although it was only a day or two after my wife first met him that she allowed him to fuck her, she later admitted to me that had I not known Edwin for as long as I did, she would never had allowed it to happen! It took me years to get her to that point. We have posted about this on this site, Interracial Story section, if you're interested in reading about that event!
I also KNOW, the climax and most exhilarating single moment during the whole time that she and Edwin were making out was when he first got between her legs, he on his knees, grasping her hip with one hand, holding his 12 inch black monster in the other and bought it's head to her wet swollen wanton pussy! Watching that black monster spread her white pussy lips that very first time as it attempted to enter her love nest, she gasping and attempting to pull away, added immeasurably to the excitement of the moment! Naturally, I guess, at that moment Edwin wasn't about to be denied his lust, held her firmly and planted about a 1/3 of that black intruder in her! After that she was his and his alone! She loved every inch he had and then some! Officially, I recall very clearly thinking, not only has she got her first strange cock out side my own (she was a true virgin when we married some 10 years previous) she was now officially blackened! There's something exciting and special about a white pussy taking a black cock! Especially so if the owner of that pussy is your wife! I guess it's the black, white thing! The taboo, perhaps!
So my suggestion is, GO FOR IT!
p.s. Yes! That is my wife's pussy in our Avatar! It was taken the morning after Edwin and she had taken time out for some much needed rest! I took this pic out on our condo patio! A few hours later they were back at it again! AWESOME!