I really love this picture, because I think it's a sweet portrayal of Wanda and Ian. I also love their hair! Epecially Ian's. But here are the things I see that you might want to work on:

1: I notice that the shoulders on both Wanda and Ian are attached a little too far off their torsos. You might want to move them in a little more.

2: Wanda's hand is a little strange-looking here, as well as Ian's. I think the main problem with Ian's is that it's way to small.

3: Ian's arm looks a little odd, especially in the forearm. It's also a little too long. You might want to work on the area where the elbow conjoins the two parts of his arm, and on his wrist and his right hand.

4: The way Ian's chest is bending in is too drastic, and his back is a little too hunched for the slightly-bent-over positon he's in. You might want to straighten him out a little, and bring the chest-line in a bit.

All in all, I really do love this piece. Just keep on working with human anatomy and proportion. Hope that helped!