I don't think cuckhold/queen is so much about humiliation as it is about getting off on your partner being with someone else. But that's just my take on it.
There's a subreddit for cuckqueen,
here's a link. It's mostly just porn video and picture links though. Something interesting though, is while cuckhold is usually just a guy watching while his wife gets gangbanged by a bunch of big dicked dudes, the cuckqueen stuff usually seems to have the wife be more active in what's taking place with her husband and the ladies he's plowing.