My fiance wants his older sister to have a part in the wedding but not as a bridesmaid (i already asked him). His idea is since he walked her down the aisle he wants her to walk him down the aisle. My question is what color dress should she wear? He thinks she should wear the same color as the bridal party, deep purple. I thinking she should not match but wear a color that compliments the bridal party like the mothers. And what should the fathers wear?