Difficulty Cumming Without Cuckold Fantasies

This works both ways I'm sure to mention her FWB before we have sex. She get instantly wet and I'm pretty sure she is fantasizing about him for at least some of the time she is orgasming. It doesn't bother me in the least I'm happy she is having such a great sexual experience.
 
I'm wondering if others here have experienced this. I've noticed that I often struggle to finish when having sex with my wife... unless I'm fantasizing about her being with another man. The arousal and intensity of those thoughts seem to be what really gets me going, and it’s become a regular part of my experience.

My wife and I have talked openly about it, and we’re both interested in exploring the idea of bringing in a third. It’s something we’re aligned on, but we’re just waiting for the right time/person to make it happen.

Has anyone else dealt with this kind of thing? How do you manage it in the meantime? I’d love to hear from others who’ve gone through something similar.
Think about my Black Cock in your sexy wife