I am the maid of honor in my upcoming sister's wedding. We recently found out that spouses are not invited to the rehearsal dinner, only the wedding party and the bride and groom's parents. My husband is irritated by this, especially with the fact that we are coming from out of town. He things this is hugely rude and tacky and I tend to agree. I know when we had our rehearsal dinner, all of the wedding party were allowed to bring their spouses, I never even thought of doing otherwise, I just thought this is how it's done and didn't question.
What do you think? Is it wrong to not invite spouses to he RD? What do the official wedding etiquette books say on the matter?