Tell your aunt that you're honored to be included in the wedding, and that the proper position for one of your age is a jr. bridesmaid. However, if she INSISTS, then do it for her. It will make her happy, and it won't be but about three minutes going down the aisle. One thing you might do, instead of carrying one of those dinky little baskets, is to get a large arm basket, and throw many, many petals all over the aisle. That would be more befitting your age than a basket designed for a five year old.