OP, you need to come back under a benign ID with a post that sounds as boring as batshit then message us all to tell us simply so we can find out how it all went down. Most importantly, does she end up with a fascinator/pill box hat and veil and was any cake throwing involved?
Bugger off would you kindly Mamamia. I see our serious journalists here in Aus on MM have as usual got no other crap to poach as the main forum in Aus for juicy stories they're not allowed near and are using their usual source of journalist integrity in the DM naturally so seems your wedding is becoming a bit of an international shindig.
I hope you haven't got any guests coming from Aus OP 
Fwiw when I married my now ex-h then thankfully I didn't have the issue of ex-mil doing this (and being her youngest son I bet she would have) as solved all the headaches of dealing with actual wedding stuff by doing it on the sly with only a couple of people there, a white slip style dress I found that morning on sale for $10 as I'd realised at the last minute I probably should actually wear something over my bikini and being a hot Sydney summer then bugger shoes, I went barefoot.
I did have some class thank you very much, I at least painted my toenails blood red 
But made it so much easier as then we just strolled on down to the beach for a swim (near Bondi) and then the pub.
Now ex-mil didn't actually know until a friend let it slip. Now THAT was an interesting phone call, all I can say is thank fuck we were two states away from her.
Wish she was now.
I call DH that by habit, we aren't actually married (he'd like to be) as I don't do weddings. Trust me, I quite simply do not want to be related (even just by marriage) to his parents as 15 yrs since we've met we still can't get rid of my ex-mil, I think I would go a wee bit insane with two like that.
But then DH agrees there so I think I'm safe. Besides, I'm pretty sure the only reason he's still so keen on the whole marriage thing now is because he can then get rid of their name and take mine, that's always been a rare thing we agree on.
But heck, even I'd find a new MIL buying her dress from the bridal section a bit disturbing...