[ Did he actually expect her to walk away? Not really. Gilberts are known for their stubborn and unyielding nature.
When she grabs at his wrist, he's thinking: oh, goody, he's about to get slapped in the face -- (assume much?). It obviously takes him by surprise when she guides his hand to her chest.
Damon blinks, feeling the warmth of her skin through the palm of his hand, and the strong, steady beat of her heart. He draws in a breath and swallows; knows he's lost every bit of fight he had before he even looks her in the eyes. (She doesn't play fair.)
He moves his hand upwards, brushes his thumb over the curve of her jaw. ]