AITA for not saying anything about the underwear?

My friend “Alice” (23f) is my maid of honor and I (24f) asked her to wear a flowing maxi dress to my wedding so she can move freely and do her MOH duties with ease. <br><br>As we were taking pictures, I noticed she was wearing lace underwear. I don’t know if it was on purpose but the dress was semi see through and everyone could see the underwear lines. It wasn’t a big deal for me but it was kind of noticeable. <br><br>One of our guests made a comment about it but not in a mean way and a few of the other guests also thought it was weird.<br><br>After the reception, my mom (53f) asked me why I didn’t say anything about the underwear. I said I didn’t think it was a big of a deal but mom said I should have said something. <br><br>AITA?