Those are very good points. I should clarify that these are not any sort of "bridal portrait" session. They are my sis-in-law saying, "hey let's go take some photos before I walk down the isle." So the photo should be considered on its own merit, rather than whether it portrays a bride. But, the points about her arm are well taken. I'm envisioning a reposition of her arm, perhaps down to her side in order to diminish rather than accentuate its proportion, and an adjustment to the angle of the shot.
Thanks for the critique.