Hermione could always be infuriating when she wanted to be, and right now Ron thought she definitely was trying. He almost would have preferred a flat out refusal to this guessing game. Almost, because she hadn't said no.
He figured it was only fair that he played along, though.
"Like this?" he asked, brushing her hair to one side, letting his fingertips graze the nape of her neck as he did so, before leaning over, pressing his lips to her skin, though only lightly, if she was going to tease him, he'd do the same.