Question about the ring bearer?

Tell your sister to return the suit and YOU rent the tux for the little guy! Tell her she can buy him appropriate shoes, which will surely be less than what she spent on the suit. I know weddings can get expensive, but really, how much can this thing cost - $100 max??? Not worth bad blood in your family for years to come. It's your wedding and your vision, but you should step up and be the bigger and better person! And no offense intended, but if this relatively small amount of money is such a big deal, perhaps you are not in a financial position to get married just yet. Good luck!