What would you do if your best friend looked up Boyfriend without asking?

I have known my boyfriend since last April we started off as friends and started dating in October. My best friend has been so damaged that she trusts no guy her friend's date. She keeps telling me to watch out for red flags which he has none and she met him and said he seems like a really nice and good guy. But that wasn't good enough for her. She went behind my back and searched about him. She is a genealogist, so she can find out anything she wants to know about someone. She saw he has been married 3 times. Something I've known before we started dating. When she told me she looked at me like she was about to bust him out on a lie. I told her I knew I didn't care and that she had no right to do that. She then proceed to say "I don't think his last wife is really dead because I found no obit" His last wife had a full mental break and died of an OD. Sadly her parents never put an obit in the paper. I had to go as far as to show my friend my boyfriend's sister talking about her and his ex's parents talking about her. My friend is so far off her rocker that she suggested that she could still be alive and "Everyone is in on it" I love my friend but I think her mental health is so bad it's making her paranoid. I was in an abusive for 17 years and I finally found someone who treats me right and makes me happy. But she is doing everything she can to try and destroy that. (My boyfriend is 43. 10 years older than me. He got married out of high school and was married for 12 years and his wife cheated. The second wife was a rebound and he ended that fast. Of course, the last one she had a bad mental break. She decided she could no longer be a mother to their special needs son and my boyfriend had to send her back to live with her parents. She ended up on drugs and OD. No one knew she was on drugs until she died)

What would you do if your best friend looked up Boyfriend without asking?
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