I love my fiancee, but I hired a model to stand in for her at my wedding. This is causing some major problems?

My fianc�e, Jessica, may not be physically attractive, but she's absolutely gorgeous at heart. She's vibrant, sweet, and always makes me laugh, but what she doesn't know is that I've been lying to all of my friends about her because she embarres me, to be honest. When my friends and coworkers ask me for pictures of her, I show them photos of this model I know, Gabby. Things were fine at first, and I was planning to have a fake wedding with Gabby and invite all of my friends to it. Later, I would have the real wedding with just my girl and our immediate family. I decided to peddle this off by telling her I want a small, intimate wedding. Unfortuantely, Jess threw everything off by demanding a big, extravagant wedding. Without my knowledge, she invited EVERYONE in my phone book to the ceremony. Now, what the hell do I do? I can't let everyone know that she's really the one that will be my bride. They'll start calling us beauty and the beast.