Frontal Hugging (done best as a positive reaction to her compliance)

[DMuffin]

I don't understand in what Vin means exactly.

Surely he doesn't mean hugging her when she says something impressive? Seems unsolid. See below
http://farm2.static.flickr.com/1039/...cea8af.jpg?v=0


I would have thought something like below except with heavy eye contact.
http://tbn0.google.com/images?q=tbn:...li/Chobits.jpg
or this
http://tbn0.google.com/images?q=tbn:...er-ccs-hug.JPG

Could someone provide the context and frame for the "hug" ?
Thank you