So many factors at play.
- How/why did the relationship end? Amicable terms? Did one party get dogged out? If the brehette in this case was the one that fouled up, that's the only red flag you need.
Be honest, was your breh an ain't shyt nikka to her?
- How long ago after the end of the relationship? Has the breh found him somebody else? Is he still hurting over the end? Still holding on to feelings?
- Is the chick putting the full-court press on you? Or are you just trying to see what all the fuss was about? Or is she just trying to get you in her because she's hurt over what your boy did?
- Is your friendship strong enough to handle it? Like, yeah, asking for permission is "ideal" I guess, but all of y'all grown, and to keep it a buck ... there are really no rules to this game. All people do is what they can live with doing to get what they are after, damn the consequences. Some people are savages, some are soulless. Some have honor and a sense of morals. To some people, getting the green light makes it okay. To others, the mere THOUGHT of trying to step to her shows that y'all were never really boys in the first place.