I like the idea here and, for the most part, the lighting and everything is well executed. I think I would have moved the bride over to the left a bit, however, so that the window frame doesn't run behind her. Then again, maybe the outside view would have been even busier... Anyway, good luck in the challenge!
Three things would have improved this shot: a much shallower depth of field, placing the head of the model away from the center line between windows (even using only one window and moving the camera accordingly) and glasses off her face (although this suggestion is solely based on preference, because I know how this can change a person). Very romantic, though, with the backlighting.