My sister is getting married this year & I'm her co-MOH. Most of the bridesmaids are young (college aged, 22 at the most) and their idea of a party is a keg or a night at a bar, not sitting around eating finger sandwiches & punch. I want to do a shower for her but traditional etiquette says that the bride's immediate family shouldn't host a shower. I've found some modern etiquette guides that say it's ok.
So, is it tacky or not? Would you be shocked if you were invited to a shower the bride's older sister was hosting? Or would you only care if you were 80 years old?