You have an old friend that you've been close to for many years. You've spent a lot of time together. You enjoy each others company. Your old friend introduces you to their significant other and the two of you get along quite well, and eventually become friends too. You like them both individually, and together as a couple. To all outward appearances they seem to get along quite well. However, while at a party which the significant other is not attending, your friend goes off with another person. Later they admit to you that they're having an affair on their significant other.
Do you tell the significant other because they too are your friend? Do you ignore it because you've known your old friend longer or because you don't want to get involved? Do you council your friend against cheating and warn that you'll spill the beans if they do it again? Do you try to break your old friend and his significant other up because you figure maybe you'll get a shot at the significant other if it happens and better you getting that sweet, sweet lovin' than your old friend? Or do you try to break up everyone, even people not involved with this scenario, because if you can't be happy then Goddammit no one can!?
What do you do? What do you do...?
Do you tell the significant other because they too are your friend? Do you ignore it because you've known your old friend longer or because you don't want to get involved? Do you council your friend against cheating and warn that you'll spill the beans if they do it again? Do you try to break your old friend and his significant other up because you figure maybe you'll get a shot at the significant other if it happens and better you getting that sweet, sweet lovin' than your old friend? Or do you try to break up everyone, even people not involved with this scenario, because if you can't be happy then Goddammit no one can!?
What do you do? What do you do...?