I went into a bridal store with my maid of honor on a whim one weekend. I tried on a number of dresses not expecting to fall in love with any of them-but I did. It was on sale, so I bought it. At the time, my fiance and I had just decided to set a date and had not told anybody but our best friends, and we planned to tell everyone together at the next family gathering. So I didn't tell my mother about the dress. I am my mother's only daughter and she was looking forward to the wedding dress shopping experience, and has started talking about going dress shopping with me. What would be the best way to let her know that I have already found and purchased my dress?