Not necessarily, Shakespeare alluded to that term, however, modern day application deals with a fetish for men desiring their wives to be sexually pleased by another man. Are you dense? Use your favorite search engine, and write Cuckold in your menu. You will find men pleasuring themselves while watching their wives engage in sex with another man.
Are you saying adulteress women are morally justified?
Also, your historical definition does not even apply to this situation because the male knows his wife his committing adultery and doing something about that. The historical definition dealt with the situation where the male did not know.
I suggest you study the origin and the current use a little more, because obviously you are not "in the know".
You like to call others names, do you? Well, oh mighty DENSE and ILLITERATE one, it is YOU who don't realize that your so-called "modern day" meaning is
only used by a perverted subculture subset and/or an uneducated youngish crowd who imagine that they know everything.
Apparently you are in extremely great need of an in depth remedial reading comprehension class, since absolutely no where in my post did I claim, state, infer, nor imply that adultery by anyone was "morally justified"!
Just because certain perverted cultural subsets have now corrupted and thusly ruined certain perfectly good English words ( i. e. "gay", for one ), doesn't mean that continuing that corruption on, as you would prefer ( re "cuckhold" ), is a "good", "modern", and/or productive change to the English language. In fact, with so people alive today, with even middling vocabulary knowledge/skills, it is the debasement and destruction of English.