Hey what's happening man first I would like to thank you for sharing your lovely hotwife with us fellas.
To answer your question: The difference between a cuck and a guy who just wants to have lifestyle fun and see his lovely hotwife get well satisfied is how that man sees himself and defines himself.
The simplest definition of a cuckold is a man with an adulterous wife. Is that you? No because you both are clearly in agreement to participate in this lifestyle so that definition doesn't describe you.
Also another definition is the Masochistic cuckold who enjoys the humiliation and degradation, and other demeaning activities at the hands of his wife and possibly her lovers. That doesn't sound like you either!
You sound more like a "Stag" husband or boyfriend of the lifestyle. A stag like a cuck both gets sexual pleasure and gratification from their wives and girlfriends being with other men and both actually encourage it but as I defined above the cuckold is usually seen as typically a weak and emasculated partner who almost doesn't have any choice in what his partner does or who she does it with where the Stag is seen as masculine man, a man's man who just wants his woman satisfied with no change in his status or indictments against his image. At the end of the day you really define yourself in this lifestyle.
Hope's that helps brother!