She's a lucky girl. One of those women whose clitoris is right on top of her vagina. His cock would be rubbing the underside of her clitoral prepuce, like having her clit wanked on the underside. I only met one woman with such a delight and so fascinated was I that I even measured the distance between the glans of her clitoris to the lower edge of her vagina, 40mm, she looked extra tight but when entered she felt like any other woman I had previously had the pleasure of. They definitely squirm and pant more when they have their clit sat on top of their vestibule, there are peer reviewed papers detailing this aspect of women's sexuality.