Sorry, my e-mail is ***@****
I'm sure he doesn't think he's done anything wrong. I think people like that always manage to convince themselves that they "loved" the person they abused or that the person "wanted" it. It's a completly twisted way of thinking. I know of this great site, it completely saved me. If you want the address you can e-mail me and I'll send it to you.
It is hard to speculate about the mind of your step-father, but as long as you are certain and clear, you should not back down from your position no matter what he says.
He may want to forget what happened, but he can't really do that. He can only try to convince others of his innocence in order to relieve his own guilt.
Denial is a very powerful process in situations like this.