Dude the whole idea of exchanging money for silence is unethical and the thing you're most upset about is her seeking actual justice? Holy shit dude, time to take a good hard look at yourself in the mirror and try and figure out what went so wrong in your life that you're at this point mentally-speaking.
She chose to make an agreement of exchanging money for silence. It was not forced on her. She had the choice to seek justice the way she deemed best fit - prosecute via the law or accept a payoff. She chose the latter. She chose that as her form of seeking some form of justice.