There are loads of material that prep you for subjects like this and are actually enclosed under separate threads. If a DW works best for you and FI, then that is what it needs to be, but I would say ensure the most important folks are there (parents, etc), siblings. If they cannot attend, and you guys feel you have done all you can, then you have to be able to stand with your decision. But in agreement with someone else statement, tone down the anger just a wee-bit (lol).