So we have been planning a trip to vegas for next weekend to meet with the wedding coordinator to see our venue, me,my sister and fiancé and now my best friend has said she wants to go too, she is a bridesmaid and knows my sister really well! but when I told my sister about her going, right away she said well if she's going im not going then!.... its so frustrating I feel like she is being so immature, so what is my sister not gonna be at my wedding then too because my best friend will also be there! I needed to get this off my chest I feel so irritated about how my sister is acting!