Wedding dress advice??

Miss

I just got my wedding dress!!! I had originally picked a tea length dress with a black velvet top and white tulle skirt. However, I found the most GORGEOUS dress I've ever see on a semi-sketch Chinese website but I took the risk and am impressed with the results. The only problem is, my soon-to-be mother-in-law already had an issue with the black on my first dress, so I'm incredibly hesitant to show this to her...

Anyone have any advice on how to break the news to my fiance's traditional southern mother that I'm wearing an entirely black dress to my wedding???