My Fiance's mother and grandmother demand that his brother is included in the wedding party. His sister is a bridesmaid and my brother is a groomsmen. Since my fiance and his brother don't get along very well, we originally made him an usher, so he didn't feel left out. They are well aware of his spot in the wedding party, but it isn't good enough to them.
I don't want to add another bridesmaid to make the numbers even and I really don't want uneven numbers. I know this is selfish, but my fiance doesn't want him to be a groomsmen either.
Should we make him a groomsmen and stop making a big deal about it? Are we being rude by having him as an usher? If not, how do we go about declining their demand?