I need some advice, while visiting my mother in law she asked if I wanted to see the dress she had purchased for our wedding day. I said of course I would like to see it, not that I need to have a say in what she wears I thought just as I had shared my dress with her she was doing the same. She came out with it on and it looked nice but it is the exact colour of my wedding dress (light ivory) which she has seen. I was speechless and she just gave this snarky smile and said what do you think. I said it looked nice but also slipped in that it was the same colour as my dress, she ignored this comment and left to go change into the dress she has purchased for her other sons wedding which is 3 months after ours. The dress for their wedding is black. We have always had a great relationship so I'm not sure where this is coming from. I don't know what to do or how to approach her about it.