Admiral Woofington
Member
OP. Break it off. This won't get better. There might be a part of you that might think "hey this might be a one time thing" especially if you talk but it usually isn't. If somebody has cheated before they are very likely to cheat again, or in this case try again. Apparently the brother knows as well. I feel for you after all of the bad luck but staying in the relationship with her is only going to make it worst.
Do it face to face as well in a public setting if you want. Less of a chance either of you will make a scene. Just tell her it's over, don't give her reasons besides "I can't trust you anymore".
As to going all out and ruining her career and his marriage, really consider your options. Be the better man in this case. Unless you have the proof it's you vs them, and unless the wife already suspects him you probably won't do much damage without proof. Keep it as a 'weapon' for later if she ever starts talking shit about you publicly. Once you've had time to heal. But you want to be calm and collected when you do this.
Do it face to face as well in a public setting if you want. Less of a chance either of you will make a scene. Just tell her it's over, don't give her reasons besides "I can't trust you anymore".
As to going all out and ruining her career and his marriage, really consider your options. Be the better man in this case. Unless you have the proof it's you vs them, and unless the wife already suspects him you probably won't do much damage without proof. Keep it as a 'weapon' for later if she ever starts talking shit about you publicly. Once you've had time to heal. But you want to be calm and collected when you do this.