This photo made me think of my parents and how, after all these years, there's still a twinkle in their eyes when they look at each other. You have captured that in this image, and have an image that will be cherished for ever, I'm sure. Good luck on a great shot <9>
A little unfair on the man!!!! Just kidding. You can feel the affection in this shot, but the main reason you could know they are damcing is the title. 6
I think this is oddly cropped. Cutting someones face in half usually isn't a good idea. One other area that I think could be improved is that exposure on her face. It appears a little hot resulting in lack of skin texture detail on the upper cheek and upper lip.