I discovered my bf has been making photoshop porn of 2 of his female friends without their knowledge for over 15 years.

I am torn as to whether I let them know they are being used and violated this way. I feel if I keep silent I am allowing an abuser to continue on with his activity and I’m protecting his secrets, typical sex abuser methodology.He won’t stop at my request, I’ve tried.

He obviously spends lots of time on the images as they look so realistic and it just feels so creepy and wrong to me. Feels almost like he’s a peeping Tom, secretly viewing these women naked etc

I’m not friends with the gals and they don’t “like” me so it’s not like I could have a friendly chat with them about this so would have to figure that part out. but I just feel they should have the right to know what he’s doing with their images, getting aroused and satisfying himself to them. If they’re ok with it then fine it won’t matter to them, but if they’re not then they can decide if they’re comfortable with it or not and if they’re comfortable with their relationship . Right now they’re just going along totally Innocent with no idea how he’s looking at them when they’re together etc

I thought he had stopped doing this five years ago after I discovered it but recently found out it never stopped and he’s still actively spending hours upon hours in this “activity”

All thoughts and views welcome . I’m just torn as to whether I stay silent and let him perpetuate this secret violation or I let them know so they can decide what to do.
Thanks