Incest Survivors Support Group
Incest refers to any sexual activity between closely related persons that is illegal or socially taboo. Consensual adult incest is very rare. Incest between adults and prepubescent or adolescent children is a form of child sexual abuse that has been shown to be one of the most extreme forms of childhood trauma. If you or a loved one is a survivor of incest, join the group...
If someone else charges him you might could witness for the prosecution. Just sayin'.
And for the record, I once saw a pic of my cousin on Facebook that really pissed me off because it was all sexual and stuff. And all his buddies are commenting on it, encouraging him.. it sucked to see it.
Is there anything you want to do about prosecuting him now? I say that because someone I know has decided to prosecute many years after the fact because she realizes that once he is released from prison and returns home, he could harm someone else (he went to prison on charges unrelated to sex crimes but it was a violent offense).
Again you are not responsible for him but I hope you will do something about your feelings right now - is there a safe choice you can make that will not hurt you but will help you feel you have made a difference in how he can treat others?
Just remember to be true to yourself and keep yourself safe - your first obligation is to heal yourself. You don't have to save anyone else.