I'll try to keep this short. So far I have 4 BMs, and a MOH standing with me who are all friends. FH also has all friends standing with him. I have 1 brother who in engaged and FH has 3 brothers and one SIL. We initially decided to do no siblings with us because my brother lives in Texas and FH's brothers are on the other side of our state (Michigan) so we wanted to keep it simple. Also, my brother is a musician and we are asking him to play for our reception which would be more special to us than to have him stand up with us.
When FH and I visited his parents this weekend his mom brought up that his one older brother would most likely be the only brother to be upset if we did not ask him and his wife to be in our wedding party, which we decided would be alright to add them no problem.
The hesitation I have is asking them to join us, but not asking my brother (because he has a more special role in my view) and having his fiance upset that she will not be a bridesmaid. We thought instead she could have a role as well, such as doing a reading for us. If I approach the conversation with them as they will both still have roles in our day, should we go ahead with this plan?