If we accept the definition (which in itself could be a misconception) that cuckolding simply means that the woman has sex with men other than her primary partner, there is such vast array of possibilities. Yet people believe that the limited range of possibilities they can conceive of covers the entire topic.

It can be cheating or in can be consensual. The wife can have one boyfriend or she can have sex with strangers. The husband can be actively involved or not at all. He can feel humiliated and jealous or he can feel proud and empowered that a woman with such an appetite for sex with multiple men still chooses him when all the other men are gone.

Cuckolding can start as his fantasy or hers. I got introduced to the idea by a dominant woman, and it was a very intense experience, both erotic and emotional. Prior to that, I once was in love with a sex worker. Technically that could also qualify as cuckolding, since she was my only sex partner while she had sex with multiple men every day.