Nobody's ever done this for her, and she feels more vulnerable than she ever has in her life. She's spread out for his taking, and even though he's the one pleasuring her, she's the one who's gasping and rocking her hips. She's the one who'd beg for him not to stop. Even though he's on his knees, she knows that he's the one who has all the power, and she wouldn't want it any other way.