It was not your fault googley! A lot of abusers want to blame the victim, so that they don't look like the one that is wrong. I'm sure she felt guilty for what she did to you, and so she had to blame you to make her feel better about herself. If the others were also blaming you, it may have been because they thought child abuse was okay and you were in the wrong, or they may have just not wanted her to hurt them too, so they put it all on you. It is NEVER the child's fault, no matter if you were a teenager. You were still a child, one that should have been cared for and protected. She should have gone to counseling for her self, so that she wouldn't have hurt you. She could have learned how to deal with her anger outburst, so that she could have been better to you. You did not deserve the abuse at all, you were innocent and so was she until she decided to carry on the family legacy and abuse you, instead of getting help for her issues. No one stopped it probably because they were scared. When there is family at hand, not many people want to speak up against them. You will work through this someday and things will get better.