Cuckolding involves another man's penis entering a wife's vagina. In "vanilla" marriages, this happens far more often than one would suspect because it is surreptitious and never spoken about with the husband or wife in question. Whether you are a swinger, the husband of a Hotwife or an unabashed cuckold, your wife is cuckolding you every time she allows another man to penetrate her.
This is our lifestyle and we enjoy it. In this video, though the wife is having sex with a new man, note the intimacy between husband and wife as she is enjoying herself sexually with her lover.