While James might not have noticed the way his words sounded, Fisher did. Fisher was normally very aware of everything he said, and did, because he was in constant paranoia that someone was watching, and therefore judging. So when the deep, satisfied moan escaped James' lips, Fisher's face immediately burst out in a hot blush, his eyes widening slightly before he ducked his head low, shoulders slumping. He didn't cease in his work, though. As embarassed as he was, and as sure as he was that everyone around them had noticed, he was a lot more scared of James' fists of fury.
Kneading harder, Fisher shifted a little in his seat, keeping his breathing deliberately even. At least he was doing well, which proved that James would see that he would be willing to do anything asked of him.