As he feels Liam's tongue and lips pulling at his fingers, Lucas shifts up and lifts half off of him. He rips his hand away abruptly and then sticks the moist digits down the back of Liam's pants without ceremony, squirming them and almost immediately beginning to work inside him. As he does this, he continues to pull backward progressively harder on his fistful of Liam's hair.

"Tell me when it hurts." Something in his voice makes it clear that he doesn't plan to stop when he hears it.