Denny,
I read and responded to your post about your stepfather on another thread. I hope that helps.
Just let me say here that when a boy's confidence and esteem have been destroyed it's possible to make him do almost anything. It's also possible to make him think it's all his fault, and predators are very good at that. After all, they need their victims to think like that so they can keep things going.
The bottom line is a sentence you will see here a lot: It is never the boy's fault. This isn't being PC; it really is the truth.
I hope you will stay and talk about this further. I think the discussion would help you a lot.
Much love,
Larry