The dress should be white, not blue/red. Check your white balance.
Consider a telephoto to get yourself farther away from your subject and shoot it wide open (ƒ2.8 or better).
She seems a little stiff, uncomfortable. I really like the chair, and I feel it could have been used a lot more creatively. Put some more distance between the chair and those hedges, and shoot from a lower angle/POV.
The wall behind the dress kills it. It feels too flat. A nice large window and that chair would have made a nice place to set up the dress shot, and the bible shot.