LMAO! The issue is not of an individual or of personality which is rather typical of Pakistanis. It is one of a supposed moral obligation. Funguy has no moral obligation to do anything in this regard. Why should he? He is not related to her. He has no vested interests.
There is this old phrase when it comes to giving advise. Only give advise you are willing to take yourself. In this situation I bet half of you would never tell the girl. Why because the fallout is damaging.
Considering you women ***** about the Pakistani community and its gossiping ways so much, what do you think would happen to Funguy and his "rep" in the community? I can see it now. Funguy liked the wife that is why he got involved. He wanted the woman himself. Or he did it out of spite and made the whole thing up.
Then of course is his friendship with his friend and the simple fact would the wife even believe him?
Its not worth getting involved in someone else's life and wrecking it. Funguy is in a no win situation and in that case one he should walk away.
I think CM is onto something here. I might follow his advice.