mob dress etiquette and problem solving?

My mother and I have very different styles. I consider myself more of a minimalist and keep my style very clean and simple. The theme of the wedding is leaning most towards boho and lots of neutral tones. Colors are terracotta, dusty rose and other earthy tones with some greenery thrown in. My dress is a very simple satin slip dress. Groom and groomsmen will be wearing tan suits with dusty rose accessories. BM's are wearing dusty rose and I gave them the website I preferred they choose from and they both did a great job choosing dresses that complement mine. Our wedding party and wedding in general will be pretty small & intimate. My mother on the other hand has very different, extravagant taste. I initially gave her free range to find her dress, as I read that the bride has very little input on this. However, she's been sending me options and they are all what I think are kinda over the top (think met gala-esque). I'm conflicted because I do want her to be comfortable but I also feel she'll stick out like a sore thumb in photos. I asked her to maybe tone it down so we can keep the wedding and the attire simple and her response was that I'm just scared that she'll outshine me (which hurt my feelings soooo much.) So I've had a hard time communicating with her about my vision for the wedding because of that comment. I don't necessarily want her to match the wedding party but I do want to make sure our photos are cohesive and people know she's the MOB. Do I just let it go and let her choose what's most comfortable for her? Or is there a nicer way to communicate my vision?