I had a relationship with a man who I didn't have PiV intercourse with. I was also in a relationship with someone else at the same time, and both were aware of each other and had met each other. The first individual was submissive to me. There was mutually agreed upon chastity, cock and balls torture, and ass play as well as forced feminization and more. I wouldn't really classify it as cuckoldry, though. It didn't have any positive or negative impact on our relationship, though him going through some mental health issues entirely unrelated did. We broke up and after a while she came out as transgender, not just a cross dresser.
I've personally never been keen on humiliating anyone, even if that's their kink. Cuckolding as I perceive it has strong notes of humiliation. I might be dominant or submissive to someone. I might not meet all of someone's needs or they may not meet all of mine. Still, there's no superiority/inferiority to it. Those who enjoy cuckolding, you do you, enjoy your kinks safely and consensually.