I feel the same way all of you feel.
They only way I wouldn't think it was tacky is if they were committing to a life-long relationship, but didn't believe in marriage or didn't think "the papers" are necessary.
The sister justified it by saying, "what's the difference if they have it now, or right before they get married."![]()
The difference is this couple is so tacky that they'll probably expect another shower when they get married.