Not a single moment he believed him, as it was the same act he put up when denying it, not even directly, as before. He enjoyed this way too much, that was for sure. So the Operative was right, he was infected. That might make it a bit more diffictult to play out his joker. It would be worth a try, but the situation was now considerably more dangerous than before. He was pretty sure he himself was still under the protection of Maren and Valery, maybe even Enma as she owed him one. It would just require to show him who he was, the Operative thought. Damnit! He started questioning himself whether he was still able to protect her. Maybe the K'hara had their plans for Elena, maybe it was just the Commune, he didn't know. His hand remained at the paralyzer, just to make sure he would be able to shoot first. The other hand was longing for Elena's hand or leg or whatever he would be able to grab, wanting to signalize her how the situation changed to their disadvantage. If he was infected, he was able to kill them without a single move, all just with the telekinetic abilities of the incubus. A simple telekinetical cut in their brains and it was over.
It was the only case he didn't expect. There was nothing they were able to do against it.