Would it be against bro code to date a woman that my best friend had as a fling?

My best friend had a fling with a woman that he treated terribly because he had a girlfriend the entire time (that he didn’t tell her about) and strung her along for four months. When she finally ghosted and blocked him, he was hurt.

I have great chemistry with her, but I’m hesitant to act on it because, although he was wrong, he is my friend.
Would it be against bro code to date a woman that my best friend had as a fling?
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