It's not that simple. My sister let it go on for over 10 yrs before telling. She was 22 when she finally got the courage.
At one point she lived 3 hours away in college, he would go there on weekends, she would still comply. They brainwash you. It's so scary and so hard to understand. I too was molested (not by the same family member), but I told right away...my sister, she just couldn't....I was angry at first, asking, 'how could you let this go on for so long w/o telling??"....It was when he molested my other sister that my oldest sister got him to leave the house w/just her, still not telling, but getting him away from us.
I do not believe that blame should be put on AR, she was a victim.