My sister can't (won't) come to the wedding. I am pretty upset with her right now, When I asked her if she was coming to the wedding. She said that she had plans to go see her in-laws two weeks after my wedding and thought that it would be to much on them to make the trip twice. Her in-laws live about 100miles from me. I asked her 6 months in advance. I just don't understand why she can't re-schedule her "vacation" for two weeks earlier.