That limb went lax, not even able to fold properly into its slot.
He felt his fingers go lax, and the staff began to slip from his hand.
Her hips arched up, pumped against his busy hand, then went lax.
At the third, she pulled the pillow over her face and let her thighs go lax.
She moaned with it as each muscle in her body went lax.
Her muscles had gone lax, and everything she was lay open to him.
A few moments later, I saw his hand go lax.
Beneath him her body had gone lax as water.
She went suddenly lax in the elevator man's arms.
He looked deep, and then his fingers went lax on hers.