Is there a rule of thumb as to who you are supposed to go dress shopping with? I have always planned on shopping with my mom and potentially my sisters, depending on their schedule and if they wanted to go (won't force them to if they don't want to). I had mentioned to my mom potentially inviting FMIL to see if she wanted to attend as I thought it would be nice to extend the invitation and my mom was a bit upset. It seems like she thinks this is only a mother/daughter thing. Is there some rule I am missing or is she just being a bit sensitive?