I know that the mother of the groom gets invited to every bridal shower (or they do according to etiquette in my small town), but does the sister of the groom also get invited to all showers?
We get along okay, and she is in the wedding as a courtesy to the groom, but to be honest she's not exactly the most pleasant person ever. If she doesn't have to be there, then I would rather only invite her to say, half the showers versus all of them.
I realize that she'll be a huge part of my life, so I don't want to ruffle any feathers if this is something that would be considered offensive.