To me, these are the best genre of stories. Wish there were more like these.

I recall there was one that was on xhamster stories when it still had a stories section.

It was about a busty yet matronly mom who was a nurse. Due to her caring nature, she went on a humanitarian mission in some war-torn mid-east country. But then after a while everyone back home lost contact with her including her family consisting of her two sons (one was perhaps very little). The story was a first person narration from the elder late teen (I think) son. One day, during his usual porn watching session, which were usually depraved, he went into dark web and found a photo titled of her mom standing, tied to a pole, totally stripped, with a rebel's hands on her two big ass cheeks and her being forced to look at the camera smiling and messed up makeup. The son eventually succumbs to his dark and twisted desires and decides to tell nobody about this. He sees other people online also finding it exciting and even willing to pay to see her getting tortured. That makes him extremely horny.

Wish I could find this story again. It wasn't completed though.