We are having a simple wedding: 1 MOH, 1 FG, 1 BM, & 1 RB...and us. Our rehersal dinner is 18 people and counting. I am having my longest best friend as my MOH (which is her style of girlie stuff anyway) while my 2nd longest best friend is not in the wedding (and she and I are less girlie anyway). Her mom is our Day-Of coordinator though. I wanted to invite her and her husband to our rehersal dinner, but I didn't know if that was etiquette. Money isn't an issue when it comes to them because they are a select few who have it like that with me. What's the etiquette? Invite the Day-Of? Or not?