[The muscles of her thighs are taut, but she's not really moving down on him anymore, letting him hold her in place and just trying to stay firm there while he fucks her. It's not clear that amount of tension is necessary, but she's certainly not paying attention to that. His thrusts send waves of pleasure through her that build and build—and then suddenly peak, and she lets out a sound somewhere between a cry and a moan as she shudders around him.]

Raven.