I agree with the ladies above!
This is a day for you and your fiance, and it should reflect you, noone else.
I would hate for any of us to look back and be disappointed in our choices because we were pleasing everyone else except ourselves.
I would just not include her in things. Don't email her things to ask for her opinion, because you are just allowing her response. Why not do what you two want to do, then send her the final product? Or better yet, just let her wait until it comes in the mail or whatever.
Find something small that doesn't mean as much to you that you can include her in, if you feel the need. But remember this is your day, NOT HERS! and don't feel bad, especially if she is not paying -- and you should know this!!!. Your fiance needs to learn to stand up to her, because from her on out it's about you two and your new family.
Good luck