In this fantasy, I take over your relationship. Your boyfriend becomes cuckolded when I become your bull. My cock is simply SO MUCH better than his. My power and dominance is so much greater. You cannot help but give in when I take you away and fuck your mind. I am more of a man than your boyfriend. Admit it– you get off to me, my voice, and my cock WAY more than you do with him. More often, and much more powerfully than he could ever provide. You are now in a relationship with ME and your boyfriend will forever be a cuckold.