I am in my friend's wedding (6 months) away, and she picked out a bridesmaid dress for us at a boutique in her hometown. That bridal boutique has sent us all an email with instructions for ordering the dress/sending measurements/paying for the dress/shipping, etc. I looked up the dress online and found several reputable websites which are selling the same dress for over $100 less than the store that she is working with. Is it inapprorpiate to ask if I can buy the dress online instead of through this bridal salon she has chosen? I don't want to be difficult or stress her out at all - it's just that $100 is a big difference. Should I ask, or just go with the flow?