I'm going to assume that you don't have intimate familiarity with the exercise of coercive power. If you really want to understand, I'd suggest that you listen to the accounts of battered women. Just recently, a professor at WSU was arrested for having had a sexual relationship with his niece, from the time she was 16 to the time he was arrested, when she was 18. She actually came from California to live with him, and he had sex with her several times a day. She did not report him until she was out of his house, and even then, it took some time for her to do it.