Definitely sit down and talk to your mom about it, but not necessarily the dress, maybe just ask if she can help out with any part of the wedding. When we went dress shopping I was planning on paying for my dress and then my mom would start talking about her and my dad paying for it. However, when it came to put the deposit down, I was the one that made the deposit. My mom made one $150 payment on my dress and I paid for the rest of it. Then again both of my parents have been laid off this year so they've been pretty tight and I was just excited they made that payment. I keep telling them I just want them to save for the trip and not buy stuff for the wedding.