Given Lucifer's order to be silent, Gabriel wasn't able to make sounds in reaction to anything. Just wince or shudder as the situation required. Up until he bucks with a silent cry as the vibrator is turned on to drive all thoughts of being difficult out of his head due to the massive distraction that's his sudden need for either more or to come, he wasn't sure which.

He looks at Claudia through slightly glazed eyes, his lips parted as he silently pants for breath. Then he nods and waits for her to shift a few inches to where there would be a better angle for him to do the work she wants him to.