<human>: Could you distill the essence of the text into 1-3 sentences?

I have been at my dream job in agriculture for two years. My boss, John, and I get along great. I see him as a dorky big brother. Recently the farm's owners hired a girl, Tammy, to help John with a big side project. Tammy had an "in" because she is good friends with the owners' daughter. She also takes riding lessons from John, and helps him when he does his outside horseshoeing job. 

Our town is fairly small, and we have a lot of mutual acquaintances. One of them recently approached me and said that she had hung out with Tammy a few days back, and Tammy had said some disturbing things about John. She said that he had smoked around her, telling her not to tell his wife. Also that John has smacked her ass and flirted with her. 

I was shocked. I know that John quit smoking years ago, and he holds distaste for them. The nature of our work is very physical, and there would be no way he could be smoking and not hacking up a lung every twenty minutes.

John is also very religious, simple, and completely devoted to his wife. I'm not sure he could imagine cheating on her. 

Now, there is the chance that she is telling the truth and he's a scumbag, but I honestly think he's an oblivious genuinely nice guy. He's super friendly and just wants to share his knowledge. I've been around him for more than two years, seeing him six days a week, and he's never come on to me.  

The community around our work is extremely gossipy, and John is well known and liked. If Tammy tells the wrong person, his reputation could be destroyed. Like I said, he's like my brother. I don't want to see that happen to him. 

What do I do? I don't have super hard evidence, and I don't want to start something if there's nothing there. But I also don't want to see this hormone crazy girl destroy his life. Should I bring it up to him somehow or just let it play out?
<bot>: married boss has teen girl crushing hard on him and not keeping it to herself. She could destroy his life if she told the wrong person her delusions.