Once again I'd have to say something (if its a good friend of mine) What if she wanted to sell it? She could get herself into a lot of trouble. What if she did manage to sell it to a good friend for a Birkin's market value? That could quickly turn into a "you knew and you didnt tell me??" situation.
I'd find a way to gently let her know.
good point!!! I didn't even think of that!
At the end of the day, IMHO clearly the issue of the BF is more important than that of the bag. If my BF had knowingly given me a fake bag and tried to pass it off as the real thing, I think that says a whole bunch about his character and I would definitely want to know, especially if the person telling me is someone I trust implicitly as having my best interests at heart.
With a more casual acquaintance, I doubt if I would take the risk of being shot for bearing the bad news......sigh....I'm too much of a coward to face the confrontation.....