No, no, no, no, no.

It was NOT your fault. You were a child, and regardless of whether you knew it was wrong, you were being coerced and overpowered by an adult. And that adult is the one responsible for his actions. Be angry at him for being so selfish that he harmed two (or more) innocent children. Be furious at him. Wish him dead and hate him. But don't blame a child who had very little control over the situation, and what control they did have they did not know how to use. No one wants to be abused. If you had known the way out, you would have taken it.