If Martin knew her limitations better, he could be pretty surprised by her willingness. However, her submission was incredibly sexy in and of itself and he didn't dismiss it.

Leaning in, he kissed her, from her lips to her chin, down to her neck. While one hand penetrated her, he used his other to rub her clit, working her up to take him. "You get me so excited just thinking about how tight you are." He says as his fingers push deeper. "You don't have to be quiet." He reminds her and he isn't talking about that moment; he was referring to what was to come.