When is wrong right?

When is wrong right? I mean, as many people say "everything is relative"; meaning the definition relies on that which it is compared too.  For example sometimes things that are generally considered by convention to be wrong is right given the circumstances.  Some would argue that it's ok to kill another human under the pretense they try to take your life.  As you well know, it's wrong to kill someone but in this example people consider it to be permissible in self defense. So given that example it seems that most things we consider to be wrong do have their place.  A question that has been nagging at me is how do my illicit friendships play a crucial role in divine plan?  There has been things that are very key to my success that have come to fruition because of friendships that are, what I felt inappropriate.  But then, the thing I have been trying to realize, just because they are inappropriate to my wife, it doesn't mean they are in appropriate to anyone else.  My wife forbids me to have female friends period.  I understand if I were a whoring man or not trustworthy.  The ironic fact of the mater is she is the one who cheated on me, not the other way around. So for this reason I am forbidden to have women as friends.  The irony of the matter is, without some of my friends that were women I would not have the job I have today and provide everything that I hand to her on a silver platter.  I have no idea when wrong is right in this situation.  When I come to an epiphany I will let you know.