Jewelry Boutique

Since when is it ok for a woman to ask you how much did you fiance spent on your engagement and follow by "hmm.... you should have pick a better ring. He shouldn't be so cheap. I'm sure your mother have a more expensive ring in her jewelry box than this ring" This woman is not even a family member or a close friend. Seriously??? My fiance let me pick whatever ring I want at what ever jeweler I want and I happen to fall in love with a non traditional engagement ring. My fiance is not cheap, I'm just being modest and practical. I was this close to tell her that the huge rock on her engagement ring is not even a real diamond but I don't want to break her heart and open a can of worm for my best friend of 20 years (her fiance) but I don't want to pull myself down to her level. I really dislike her and the only reason I'm nice to her is because she's my childhood friend's fiance. Now it really bother me knowing that she's in it for his money.