That's the whole idea

 

"Yes Dear! That's the whole idea, isn't it?"

"I'm just asking to make sure that you know the implications of dressing me like a pleasure slave and then taking me to him."

"He's a big handsome Black Master my Love. And he has expressed a desire for you to be his Mistress. It's the Natural Order for a husband to give his Wife to such a man, and I know where my duty lies."

"Yes! But how will you feel when I am lying naked in his bed with his strong dark body thrusting between my open thighs? And will you be able to cope with the shame of another man's seed fertilizing your pretty young Wife?"

"I can cope with it all my Darling, because as you know ...

... I am now, and have always been, a true cuckold."