Etiquette? I don't think I'd be concerned about that since the girl getting married has already broken every rule in the book with her tackiness. Also, you might ask a couple of others at work if they want to "go in with you" on the shower gift. I certainly would not give another gift for the wedding. I'd let that one gift surfice. Actually, I would be so offended with the young lady's greedy attitude, I probably wouldn't even bother to attend or give a gift for either the shower or the wedding.