So you have a double standard? You'll forgive the brother but not the girl? That's fucked up. She is no worse than him and in truth he is the lowest piece of shit in the group. Sorry.
Hope your remember this the next time he fucks you over.
She is no worse than him, but the brother isn't the lowest POS in the group. All three of them acted horribly, but the brother's buddy was less of a prick because he didn't have either a platonic or romantic relationship with SR7138. SR7138's now-ex betrayed her boyfriend's trust in an enormous way and obviously his brother did as well,. Just a sad story all around, but the brother and the girlfriend are equally culpable, because they both had a relationship with SR7138 and forked him over pretty good.
Stories like this make me want to stay single forever. I know some stats say that men cheat more than women and that women typically cheat for emotional reasons and men for physical. I think that while men may have had higher rates of cheating in the past (say 50 years ago when women had less freedom and independence), ever since the sexual revolution, the cheating has equalized. And just among my circle of extended friends, I know quite a few girls who cheated for the same reason that SR7138's girlfriend apparently did -- for short-term physical gratification, the quintessential mail reason. She couldn't keep it in her pants. I also know a couple of guys who carried on emotional affairs with women other than their girlfriends. Basisally, life sucks. As a single 27 y/o SR7138's story just confirms to me that I should seriously reconsider my plan to get married and have kids someday, because while it's bad enough for a boyfriend or girlfriend to screw someone over like this, I'm sure it's even worse when it's your spouse and you have to go through the messy divorce proceedings.