I can totally relate to this story. My stepfather molested me starting at age 6 (and my mom knew all about it). Three years of continuing abuse later, my mother married the scumbag and made me call him 'dad'. He molested my sister also and it went on for years, but I was his main target. My mom stayed married to the criminal until I was 21 years-old. She left him for reasons unrelated to the abuse.
To this day, my entire family, including my own mother and sister have a close relationship with him. I was told to get over it and that he's changed. Child molesters don't change. My entire immediate and extended family (including my niece and nephew) rejected me because I won't forgive the bastard. I cannot fathom choosing a non-family member who is a child molester in favor of a loved one who was abused. Not only does my family have a relationship with this asshole, but they actually idolize him as a father, grandfather and husband to his new wife. I'm very rarely invited to any family functions anymore (he is always there) and I even had to skip my nephews wedding because my abuser was there with his entire family. It makes me feel sick and crazy. When I explain the situation to close friends, they are in total disbelief. I've begged my sister to stop inviting him to family functions so I can be there, but she refuses to exclude him. He's such a sick bastard that he feels no shame in inserting himself. and he knows damn well that if he is present at an event that I don't feel comfortable attending. He's a total narcissist.
It haunts me to this day and I've lost my entire family. It's insane to me and I can't be around them anymore.
I feel for Anna. I wish I could reach out to her and let her know that her feelings are true and rightful. She's not the crazy one.