I know we've had similar threads before, but let's rehash: What would you do if a friend's significant other said something inappropriate to you? What line would they have to cross in order to get you to mention it to your friend? Would you tell a friend if they flat out asked you to hook up with them or told you they had feelings for you? What happens if the friend's SO is also someone you consider(ed) a friend of yours? Does it change depending on how well you know your friend? Does it change depending on how serious the friend's relationship is? Would you want a friend to tell you if your SO was either cheating on you or mentioning they'd be willing to?