No way Sheree, she is being ridiculous.
However (not defending her I swaer) I have been there and wanted to be the perfect bride on my perfect wedding day. No matter how level headed you are a wedding is a stress. It feels like no-one wants to co-operate.
$600 is also ridiculous. Has she stopped to think for a minute that you may not be able to afford that? Is she offering to pay for it?
Geepers 4 months is heaps of time to have a dress adjusted and any good dressmaker can refit ANYTHING.
Does Wade really want to go?