I'm not sure if you were meaning me, but I'm definitely not a prude. Everyone (almost) looks at porn.

A google of this subject took me to an Australian support site, where a woman had a similar experience:

My husband's pornography addiction is destroying me

In her case, the images she and her sister were photoshopped onto were sometimes violent, so that's different to the OP's situation.

But the shock and horror comes through.

This is not about boys being boys imo, Job. This mature man is doing something horrible to his two female friends. And they have no idea. The image, once made, can get out into the world at any moment.

In England, we have passed laws around 'revenge porn' (I don't like that phrase, myself).

I see that Georgia has a law on their books which treats this sort of thing as being a similar offence to slander:

"to provide that a person commits defamation when he or she causes an unknowing person wrongfully to be identified as the person in an obscene depiction"

It's a complicated topic, no doubt. But let's call it what it is. A form of sex abuse.