Remember to not forget details. cucks seem to love details. I have the wives I fuck tell him about every little thing, like how my cock head feels initially spreading her cunt lips, my viens on my shaft, my cum taste, pre cum silkyness, the forrce that I shoot cum inside her etc. etc.
Making sure he understands each reason why you are more attracted to me, why I feel better inside you is huge to drive him crazy.
Lastly, any insecurities you have like you’re nervous that you might fall in love with me and that I treat you better than he does, more wealthy than he is etc, those deep “admissions”as you are getting close to orgasm are so hot to hear.