i like this, the "surprise" of it is a great concept, and she pulls it off well. he looks very unengaged in the photo though. he's body language says "i'm just here with a pretty girl" his back too rounded in the shoulders, the lack of touch to her.... he's a disappointment. she is fantastic.
(i speak bluntly not to hurt, but to give encouragement, and note of detail to improve by. it is meant in the best of spirits.)