Ok so my sister lives in Kansas. She might not be able to make it due to financial reasons come time to stand up in my wedding. Of course I want her to be in it but I want only 5 bridesmaids. Would it be awful to explain this to my one friend and ask her to be a fill in for my sister is she can't make it? It's in 2018 so I know I have time. I just know that she's supporting 5 people and that even the cost to drive would be to much. Would it be really bad or tacky to tell my gf this? I'm only having my 2 closest long time friends, my sister (hopefully) my soon to be step daughter and my niece. My gf that I want to maybe sub I haven't known as long even tho we are really close. I just don't know what to do. Please help!