Oh hun, I am so sorry.
We got married in November, and the thought of that happening ... UGH. Sickening.
Good advice here. It is YOUR (you and fiancÚ's) day. You are celebrating the love you have for each other and your commitment - AS YOU SEE IT.
Here's a post from shortly after the wedding from my blog. It may be useful, particularly having a back story for your gf, if needed. http://www.polyamory.com/forum/showp...1&postcount=61