one-way full (she full he soft) aka cuckold-lite — are real couples actually doing this

im a 36yo guy and the fantasy of watching my wife with another guy while i stay out of the action drives me crazy in a good way. she's open to trying. but its not full cuckold like the porn version, more like we'd still play together w other ppl on soft side and shed have full only with selected guys with me present. is there a name for this even? "one way full"? "cuck-lite"? anyone actually doing this irl long term or does it always slide one way or the other eventually. ngl i also worry the dynamic gets unbalanced over time and she ends up resenting that i dont play full too