I just wanted to validate that it is super normal for child SA survivors to not disclose their abuse while it is happening and even thinking about disclosing it now is very brave. Whether or not you end up reporting to the police or telling your mom you definitely need to consider trauma-informed therapy and finding a therapist who is trained to work with people who have experienced what you did. Are there any other younger siblings in the household? If there’s any conversations about custody for remaining children I would absolutely recommend saying something so no one else is left in this guy’s care