Trigger warning! I need help

I’m so lost and completely confused. My boyfriends daughter posted this on social media yesterday and I have no idea what to even do. I obviously ss it and sent it to him.

As rape is something I have had to go through twice I reached out to her but I am absolutely flabbergasted that her mom never told us or at least her father! I’m so upset because we had been going crazy wondering why she was getting into so much trouble at school last year and being so rude. I mean this obviously explains it now over a year later! I just wish we would have known so she could have felt more family support. She has pulled away drastically from her dad since this happened. I just feel so terrible