HELP! I need to figure out how to get more answers???

Yesterday, my little sister came to me with something surprising. While waking up, she had seen obscene conversation on our other little sister’s phone. It was a message of her Live.me account, which was an exchanged with an unknown male. In the message was a random conversation & then it turned dark. He asked her for NUDES. A 12-year-old LITTLE GIRL. I was livid. I went through her phone to find the messages and couldn’t. I went through pictures and couldn’t. So, I called her in and asked her about the situation. And, she told me the partial truth, which was that she had done something inappropriate only ONCE, similar to what was told to me. I immediately told our parents and after going through intensive, they found more than 20 obscene photos and videos of her. She got the usual punishment (ass whopping) because obviously that isn’t tolerated.

But, I don’t believe that should be over. I mean her social media accounts are deleted AND blocked. BUT, I.. we need to know when and why this all started? What prompted it? Because this isn’t something a 12-year-old thinks about, boy or girl. Yes, she’s naive and impressionable, but this isn’t something you just do one day. Especially, when you know better.