No there wasn't. Greg knew Kevin cared and in truth he did too. He didn't want Kevin to be returned to the auction house should anything happen to him.
It fascinated Greg how Kevin reacted whenever he fed, Kevin wasn't scared that much he knew it wasn't fear it was something else. "They should happen more often. After all you have a master to look after" he said, though they both knew that since Kevin had become his feeding slave they had now viewed their relationship as friends more than anything else.