Personally, I think GW brainwashed Tracey with fear (amongst other things) and further 'cemented' his control over her feelings about herself when he won custody of their son.
I can't even begin to think about how devastating that would be and how difficult it would be to rebuild her self value. How difficult to get past the fear that keeps her quiet.
Imo, if Tracey truly knew she would be forgiven and supported by her family, her friends and community, she would do the right thing and come forward with what she knows.
Her faith should let her know she is already forgiven.
Praying she finds the courage to do the right thing. And that she knows she is still valued and loved.