very cute!
A little over exposed though.
On the second one maybe if the boys head was just over her shoulder. This would bring their faces closer together and would have allowed for a tighter shot. I think thats what all the photos needs, a more intimate composition, where their faces are touching/heads close together. Then you can zoom in tight for a nice shot.
Those two are adorable.
*edit*
The heads are close together in the first but a tighter crop maybe just under the shoulders would have been nice.