Mirza didn't notice the change - mostly because his mind was somewhere else. Somewhere mixed with heat and sand and honeyed dates; like a little piece of him was inside everyone and Shae included. Like if he really wanted to, he could keep Shae going for as long as Mirza wanted - torture and torment him with a need he would never come to complete. But that was not what Mirza wanted.
What he wanted was what he got - for Shae to explode; for him to give in to the full sensations of pleasure and make the air vibrate with the sound of his release. It really didn't matter who heard them. All that mattered was that Shae gave in as Mirza's body still squirmed and writhed against his, unable to help himself one bit. Even when Shae slowed, Mirza still moved though it was just slight. It was like his body couldn't stand being still for one second.
And yet the first words out of his mouth were both almost inaudible and very important, "Get the cuffs off me..." He swallowed hard and then repeated himself a bit more firmly, "Cuffs. Off. Now." That was the important thing to him. Not some 'was it good for you' talk because clearly he had enjoyed it or even letting Shae enjoy the afterglow. The important part was getting the abrasive metal off his wrists and making sure he wasn't bleeding from the twisting.