It was late on a school night, so Jennifer’s kids were already asleep when she got a phone call from a friend of her 15-year-old daughter, Jasmine

“Jasmine is on a Web page and she’s naked.” Jennifer woke Jasmine, and throughout the night, the two of them kept getting texts from Jasmine’s friends with screenshots of the Instagram account. It looked like a porn site-shot after shot of naked girls-only these were real teens, not grown women in pigtails. Jennifer recognized some of them from Jasmine’s high school. And there, in the first row, was her daughter, “just standing there, with her arms down by her sides,” Jennifer told me. […]