Baby gift return on Amazon?

Brittany
So we just recieved a gift from one of my cousins, however it's scented diapers and since hubs and I both have issues with different scents making us break out in rashes we would like to return them and get an unscented pack. Since the gift comes from Amazon does anyone know how we can return it without my cousin knowing? We are so thankful she thought of us, and don't want to let her know we returned them to upset her or seem ungrateful or something...