Gaius's voice raises in another shout--because he can feel those hips moving, thrusting in, pounding again against that over sensitive prostrate as Estinien jackhammers home. He clings for dear life, keening and breathless as Estinien accidentally discovered 'overstimulation' as a kink.

When they're both done, Gaius's legs are numb and his lashes are wet, and he's got blood under his fingernails. (It isn't his.)