WHY do you want to tell her? Because it drives YOU crazy? It's not your "job" to educate her about designer bags. It can only cause harm & awkwardness & ill feelings etc. You've already *tried* to tell her and she outright REJECTED that kind of input. Are you just so very, very anxious to be "right"? Why does it bother you so much?
hmm...
if a person is knowingly carrying around a fake, and doesn't care, then neither do i.
however, if i was in the same situation (with someone who couldn't take hints), i would feel obligated to tell them that it's fake. fake bags are illegal, plain and simple. and that would be my sole reason for telling someone, especially since this cousin is giving them out as gifts, etc.
telling her can certainly be done in a way to foster negative feelings..but it can also be done positively (hey, your bag isn't quite real- so why don't we get you a piece of the real deal...that sort of thing. you acknowledge it is fake, but offer a solution- not just leave her purseless).
and i certainly do not think it's a matter of being "right"- that sort of behavior is when you are arguing different political views with friends or something, and no one wants to be wrong. this is entirely different. if i were being lied to, i would hope my friends and family would tell me (in a loving way, of course).
in the end, it comes down to this: fake bags take away value from the authentic. as a member of tpf, who is adamently against fakes, shouldn't a member have some sort of "obligation" to inform some people of inauthenticity (of course, don't go up to every person on the street who has a fake. be reasonable). and i certainly DO think we should educate...who knows, maybe this girl will turn into a lv lover?
point is...it shouldn't be a bother to ANYBODY but, rather, a concern. like i said, fakes are illegal. and it's not about being RIGHT, it's about doing the RIGHT THING, for that person (every person is different...i have friends who i can make fun of their fake bags...and other friends who would break down in tears and hate me if i said anything against them. KNOW the person you're talking to. if they can't handle it, then leave it alone. pick your fights!)
/rant.