My boyfriend (28) is planning on popping the question in spring of this year. We've been going back and forth between elopement or a small wedding. Whenever we've discussed it, we always said we want to get married in the fall around October. I've discussed it with my family, and his family knows its coming (I'm on their family Christmas card, attended the holidays, etc.), but I haven't discussed it directly with them. It's made more difficult because my boyfriend and I are long distance (by 3 hours), and only see each other every other weekend right now. He'll move back in 6 months.
My FSIL (23) got engaged this past June. My FMIL had been saying that my FSIL would not be getting married until December 2018, as she and her husband are building my FSIL and FBIL's house right now, and wanted a break before planning a wedding. My FSIL always seemed to be okay with that. However, at the end of November, my FSIL announced that they would be getting married December 2017. They moved quick and already have a venue booked and have printed save the dates.
My question is this: If we do decide to have a small wedding rather than elope, can I get married before his sister? She has been dating her FI longer, and they got engaged first. My boyfriend and I are both older, he already has a house, and we're ready to move forward. My FMIL will not have to plan or pay for the wedding, as my parents will cover that, but October is rather close to December.