The dynamics are discussed in detail in another thread.
I know this will be tough for some of you to accept, but it's reality. I know very few women who can actually remain faithful to her man. Virtually every woman I've met who is in a relationship WANTS to cheat. This includes married women but also women who are supposedly in a committed...
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Basically, women are "heat seeking missiles" instinctively seeking out the most alpha male in any room. Your status has clearly been diminished and she no longer respects you.
A simple way to handle this in the future is to tease the guys back, unloading just as much ammo as they throw at you, but with a smile on your face the entire time. It's a defensive measure only, don't go on the offense, or get angry. Just stand your ground and give as much as you get.
But yeah, this one was over before it even began. Telling her you wouldn't bring her around your (male) friends telegraphs a lack of confidence. It's one thing not to, which is perfectly normal and understandable, but it's another thing to tell her you won't. It makes it all too obvious you lack the confidence to keep a girl's interest in light of potential competition.
For those guys trying to draw lessons, there aren't any really. This is some small town hillbilly bullsh-t. Such scenarios are filled with insecure, hyper-aggressive losers who only derive a sense of importance by trying to humiliate others. Their job washing dishes at Arby's certainly ain't cuttin' it.