yes you should. It would be a nice thing to do.
tell them its in the friend handbook
You can tell your friend that they are being cheated on or you do not do anything.
No
What is the point.
I NOT
Follow your gut
tell them to pick if they love you they'll pick you if thy don't you and his wife are being used and you should get out of there .
Just say that since your a couple you should be honest if you cheated or something then tell her that if you did you can tell me but never say or accuse them of it they will break up with you if they didn't and you accused them of cheating
It would be wise of you to stop your hacking (curiosity killed the cat) and mind your own business. You broke the law so telling the person being cheated on will blow your cover. Most importantly the person being cheated on will find out soon enough.
Yes, before you act guilty and she suspects you
you go and tell him you cheated on him and tell him how sorry you are and ask him to forgive you.
you should tell your parents and they would find a way to help