An uncomfortable best friend

So i have this friend, we hang out all the time and not a day goes by that i don't speak to her. In so many ways we get along, the ultimate best friend every girl needs.

But then there's this part of her that flirts with every guy she meets and then she wonders why she ends up in all these situations. She even came onto my ex. We get along in so many ways except for this one area - men.

And its one of those feelings that come deep from my gut saying "danger, danger, go back wrong way" that comes everytime i'm with her and my ex or any other man.
f
She's embedded into my friendship circle so i can't go back. And more so i enjoy her company in so many ways but one. But that one is really about integrity and values, its to do with something so crucial about the way we are and who we are.

Can i turn a blind eye on this one?