My sister is going away and getting married, just her, her fiance and their daughter. I want to give her a shower, just close friends and family. Someone said that I can't, that it is rude.
Well, they probaby say it is rude because usually you never invite someone to a shower that is not invited to the wedding. Also it is not usually proper for immediate family of the B or G to host the shower. But under the circumstances I think it would be OK, as long as everyone knows the circumstances. Maybe mention in the invitation their plans and then your guests can choose weather to attend or not.