Her initial response was confusing--had no one done this for her before?--but then she was engaging in the moment, and he focused back on his task. His tongue moved over her quickly, though he used his lips and teeth to tease her too. While he might not always be the best at reading women, this he could do.
As his mouth worked over her, one hand came up, sliding beneath his mouth to slip his middle finger into her hot channel, working in and out quickly, wanting to feel her lose herself to him completely.