Was I in the wrong for sending this message to my friends sister telling her that my friend is a pedophile?

Anonymous

So a while ago my 27 year old friend told me that he dated an 11 year old girl when he was around 18. He said he told His therapist, and that he regrets it. I know he said he's into minors, and I kind of recall him telling me he's into children as well. Like 6 years old. He is around his older sisters daughters a lot. I decided to send a message to his sister on Facebook. This is what it said.

"Hello Angela, I'm not sure if you remember me. I'm a friend of daniels. He told me that he dated an 11 year old girl when he was I think 18-19. He said he is into minors, and I can't remember exactly, but I think he said he is into girls as young as 6 years old. I am worried, because you have two daughters, and he says he's around them often. Sorry to throw this on you, but I really felt like you should know."

Did I say the right thing, or should I change some stuff? She hasn't seen it yet, but she could any minute.

Was I in the wrong for sending this message to my friends sister telling her that my friend is a pedophile?
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