I'm new here i'm a cuckold slave wannabe, i want to explore more this fetish
You are welcome to discuss!

True cuckholding is something I never quite understood. I once had a male roommate who liked the idea of his gf having sex with other men while he participated, but that's more like a threesome, isn't it?

I can understand the fetish. Absolutely.

If you truly love your wife, then to see Her with someone else while rubbing your nose in it, would be the ultimate humiliation.