She whimpers in return with each statement. His voice hits an auditory erogenous zone in her brain that's only activated by him and him alone. And by the time he gets to "beautiful" she is there and that just pushes her so far over the edge it's just one last tilt of her hips and she cries out his name as she comes. She sees stars as her body tightens and pulses around him, the feel of him inside her when she comes, intensifies her orgasm that much more and her hips continue to rock against him as it washes over her.