Now - as to if it will happen again, if he doesn't get counseling in all likelihood yes it will. If his abuser is still being allowed to abuse him, yes in all likelihood it will. At this moment in time - until he reaches 18 - it is his parent or guardian who has to seek counseling for him so he is at their mercy, which has a potential to either help or scar him for life. Even if he gets counseling, if the abuse was extensive enough there is a risk it may happen again. Because of those reasons - you and your cousin n anyone else who has been or could potentially be hurt by him should stay away til he has been properly treated n shown improvement. Both of you should get counseling to help you heal. You are both victims to sexual assault and need to be able to deal with it in a healthy way and a safe atmosphere.