The chastity belt during intercourse

I really want to bring my wife sexual satisfaction. Teasing and denial work wonders. She enjoys cunnilingus, but she also loves penetrative intercourse. We usually have sex this way once or twice a week. To help me keep better control, I need to wear a condom while we are doing it. My wife has not given me permission yet for me to cum. The sensation feels much like teasing does. When the denial cycle starts off, feeling during penetrative sex is quite mild. But on day 27 of my current cycle, controlling ejaculation became really tough. After about thirty minutes I was buzzing with excitement and felt a huge pressure building up in my testicles. My wife commented: “I think you could do with a cold shower before bed tonight.” And as usual, she is correct.