I need some major advice! I am having my bachelorette party next summer and picked a date that would be in between my school semesters. I checked the date with all of my bridesmaids and my sister (who is my maid of honor) over two months ago, and everyone agreed on the date. A couple of weeks ago my sister called me in a panic and said she suddenly realized she had told a very close friend she would attend her wedding on the same weekend. My sister is not in the actual wedding, and no save the dates have even been sent yet. She asked me if there was any way I could move my date because she really wants to attend this wedding, or if I would be upset if she left my bachelorette party (which is in Mexico) a couple of days early to try to make it to a wedding. I am pretty upset because if it were my sister's bachelorette party, I would never consider asking her to move her date for my friend's wedding that I am not even in, especially since it is 6 months away. I just don't know what the right move is, and I don't particularly want to go through the hassle of trying to move my date just to convenience her lack of planning when I asked her multiple times to confirm my date, and I am pretty upset that she is even asking me to do this. Just hoping for some enlightenment on what I should do!