DP has several nephews, but one in particular is very close to us. He's 10, very interested in fashion, and is an absolute little Sweetheart. When we got engaged he was so very excited. The last time we visited their house, he had a list of wedding dresses to show me on his laptop. He had spent ages looking up dresses that he thought I would like and saving links to them. He and I spent a good 2 hours snuggled up in front of the fire while he showed me dresses he had picked out for me (they were all gorgeous and exactly the kind of thing I'm looking for, he has excellent taste 
). So, before we left, I asked his Mum (DP's sister) if she thought he might like to come along when I went dress shopping. She reckons he would love it and be delighted to be included.
My Mum was asking about dress shopping today and I mentioned that I want to bring him along. She laughed and said that it was a ridiculous idea 
. We won't be traipsing around loads of shops, my sister's friend owns a bridal shop, she is going to give me an appointment after the shop closes on a Sat evening, we are going to bring a few bottles of Prosecco, I'll try on a few dresses and we'll have a good old laugh. DP's nephew would love it. My Mum can't articulate why she thinks it is a ridiculous idea, but is very resistant to it, as is one of my sisters. DP's Mum has also poured scorn on the idea when I mentioned it to her. So AIBU to want to bring him along?