((((((((Eric)))))))) You did not tempt your cousiin. If he was that much older, than the responsibility is his, not yours. Even if I hadn't taken off and locked the bathroom, it would have been my brother's (and probably his friend's) responsibility. The fault was in whoever denied your suffring and your cousin's sister's, and God knows who else's because they didn't want to know.
My parents raised us right; that's why my brother couldn't use force and why I felt I could go to them. That is why there was, at least as far as I know, one and only one time. In another situation I might well not have had the support to resist. In your case, for some reason, those responsible did not shoulder that responsibility. It wasn't you, Eric. It was NEVER up to you.
Loveregardless: couldn't have said it better. Huggs all.